Question

resins play several important roles in maintaining the health of conifers and many other kinds of trees. 7 resins quickly seal wounds, which helps prevent harmful insects and fungi from entering trees. these sticky substances also help trees retain water that is needed for them to survive.
which choice completes the text with the most logical transition?
a. for example,
b. however,
c. regardless,
d. next,

Explanation:

The sentence before the blank talks about resins' role in sealing wounds and preventing insects and fungi. The sentence after says resins help trees retain water. "For example" (A) shows an illustration of the previous point. "However" (B) indicates contrast which isn't here. "Regardless" (C) is about ignoring something, not fitting. "Next" (D) is for sequence, not relevant. So "For example" is the best transition.

Answer:

A. For example