Read the passage below and answer questions 1 to 5. Every year after the onset of the summer rains, thousands of zebras assemble in the Boteti River region and begin an extraordinary journey toward the Makgadikgadi Pans. Driven by an innate instinct for survival, these majestic animals travel over two hundred kilometers across harsh terrain in search of fresh green grass. The salty pans, which remain dry and barren for most of the year, transform miraculously into lush pastures rich in mineral-dense nutrients. Scientists have discovered that this annual migration is one of the longest land mammal movements in Africa. However, growing human settlements, fence construction, and prolonged droughts pose severe threats to the ancient migratory corridors that the herds have navigated for generations. According to the text, why do the zebras undertake this long and difficult migration?

Read the passage below and answer questions 1 to 5. Every year after the onset of the summer rains, thousands of zebras assemble in the Boteti River region and begin an extraordinary journey toward the Makgadikgadi Pans. Driven by an innate instinct for survival, these majestic animals travel over two hundred kilometers across harsh terrain in search of fresh green grass. The salty pans, which remain dry and barren for most of the year, transform miraculously into lush pastures rich in mineral-dense nutrients. Scientists have discovered that this annual migration is one of the longest land mammal movements in Africa. However, growing human settlements, fence construction, and prolonged droughts pose severe threats to the ancient migratory corridors that the herds have navigated for generations. What does the word 'innate' mean as used in the second sentence of the passage?

Read the passage below and answer questions 1 to 5. Every year after the onset of the summer rains, thousands of zebras assemble in the Boteti River region and begin an extraordinary journey toward the Makgadikgadi Pans. Driven by an innate instinct for survival, these majestic animals travel over two hundred kilometers across harsh terrain in search of fresh green grass. The salty pans, which remain dry and barren for most of the year, transform miraculously into lush pastures rich in mineral-dense nutrients. Scientists have discovered that this annual migration is one of the longest land mammal movements in Africa. However, growing human settlements, fence construction, and prolonged droughts pose severe threats to the ancient migratory corridors that the herds have navigated for generations. Which of the following factors is listed in the passage as a threat to the zebra migration?

Read the passage below and answer questions 1 to 5. Every year after the onset of the summer rains, thousands of zebras assemble in the Boteti River region and begin an extraordinary journey toward the Makgadikgadi Pans. Driven by an innate instinct for survival, these majestic animals travel over two hundred kilometers across harsh terrain in search of fresh green grass. The salty pans, which remain dry and barren for most of the year, transform miraculously into lush pastures rich in mineral-dense nutrients. Scientists have discovered that this annual migration is one of the longest land mammal movements in Africa. However, growing human settlements, fence construction, and prolonged droughts pose severe threats to the ancient migratory corridors that the herds have navigated for generations. What is the main purpose of the author in writing this passage?