Answer:
Tundra
Explanation:
The permafrost prevents roots from forming and supporting the trees.
The answer to the first choice, "exploit". Aside from meaning a remarkable or heroic act or deed, the word may also mean an act that is worthy of praise. To help you with this type of questions, there are several dictionaries online that you may look into.
Mary Maloney<span> was always very </span>lonely<span> at home. ... In other</span>words<span>, she uses Sam as her alibi.</span>