Since most of the pacific’s low islands have poor soil and few mineral or energy resources, they
a. have relatively large populations.
b. have relatively small populations.
c. produce bananas and cacao.
d. are mainly urban centers.

Since most of the Pacific’s low islands have poor soil and few mineral or energy resources, they

B. have relatively small populations. 

They have small populations because their resources are limited. The Pacific low islands cannot accommodate larger population and those who desire to have more tend to move to other places where their needs and wants will be satisfied. 

My answer is letter d