In the expression \(4a^2 + 4a - 18\), the term \(4a\) is classified as a term.
Here's a breakdown of the options:
- Quotient: This refers to the result of division, which does not apply here.
- Sum: This refers to the result of addition, which also does not apply to just \(4a\).
- Term: This is correct, as \(4a\) is one of the separate components in the expression.
- Factor: While \(4a\) could be part of a larger factor in some contexts, it is not a factor in relation to the entire expression.
Therefore, the correct description is term.