Question

which of the following is a pest which affects millions of acres of forest land?
mosquitoes
cockroaches
bark beetles
sucking louse

Explanation:

Bark beetles are known to infest and damage large areas of forest land. They bore into the bark of trees, disrupting the tree's ability to transport water and nutrients. Mosquitoes are more associated with human - health issues (carrying diseases like malaria, dengue). Cockroaches are mainly pests in human - inhabited areas (homes, restaurants etc.). Sucking lice are usually pests of mammals (like head lice in humans, or lice on other animals) rather than forest - land pests.

Answer:

Bark beetles