B. His or her. Because the other ones are not correct grammar. I might be wrong and if I am the answer is A. Their.
Answer: It means the person was running through the corridor without anything in their arms.
Explanation: The word unencumbered means "Not having a burden". So, with this in mind, it means the person is running free of things that hold them back. They're running freely.
The answer is (b) volcanic rock-lichen mosses-sea grasses
I HOPE THIS HELPS :)
Answer:We are strong enough to pursue acts of insolent aggression against others.
Explanation:I believe it is this line.