When lichens grow on bare rock, they may eventually accumulate enough organic material around them to supply the foothold for later rooted vegetation. These early pioneering lichens can be said to do what to the later arrivals?
A)tolerate
B)inhibit
C)facilitate
D)exclude
E)concentrate

Question

Quizplus · Accepted Answer

The word "facilitate" means to make something easier or possible. Therefore, the best choice is C, which means that the early pioneering lichens help to supply a foothold for the later rooted vegetation to grow.

When Lichens Grow on Bare Rock, They May Eventually Accumulate