Question

tell whether ∠3 and ∠4 are only adjacent, adjacent and form a linear pair, or not adjacent.
not adjacent
adjacent and form a linear pair
adjacent only

Explanation:

Adjacent angles share a common vertex and side. A linear pair are adjacent angles with non-common sides as opposite rays (forming a straight line). Assuming ∠3 and ∠4 share vertex, side, and non-common sides are straight.

Answer:

adjacent and form a linear pair