Conditional decisions in a program are handled by checking a condition and taking different actions depending on whether that condition is true. The common structure for this is the if-statement, which evaluates a condition and runs a block of code when the condition is true. It can also include an else part to run something when the condition is false, and sometimes else-if for additional checks. For example: if (temperature > 100) { alert('Too hot'); } An expression is any combination that yields a value, such as a comparison like x > 5. The result of that comparison is a Boolean—true or false—which can serve as the condition inside the if-statement. Abstraction is about simplifying complexity, not about the specific control flow used to make decisions. So the term that names this common programming structure for implementing conditional logic is the if-statement.

Styling language is CSS. HTML defines the page structure and content, while CSS describes how that content should look—such as colors, fonts, spacing, and layout. CSS uses selectors to target elements and declarations to set presentation properties, allowing you to change appearance without altering the underlying content. The other options don’t fit because HTML is for structure, JavaScript handles behavior and interactivity, and XML is another markup language not specifically used for styling web pages.

An expression is any valid unit of code that evaluates to a value. This includes simple values like 7 or true, variables like x, or more complex combinations such as x + 3 or max(a, b) * 2. The key idea is that expressions are things the computer can compute to produce a value, which is different from actions that don’t yield a value. Boolean refers to a data type for true/false, which is a kind of value an expression can produce but isn’t itself the unit of code that resolves to a value. Frame isn’t a standard term for a unit of code, and Abstraction is about hiding details to manage complexity, not a code unit that yields a value. So the best fit for “any valid unit of code that resolves to a value” is the expression.

Using a

tag creates a paragraph of text in HTML. It marks a block of content as a paragraph, which gives it the typical paragraph spacing in browsers and makes it easy to style with CSS. You wrap sentences inside

…

to separate different blocks of text. This tag is specifically for text paragraphs, not for embedding video, creating lists, or making hyperlinks (those use