"Don't be a Scrooge!" Jack said. "We will be doing this alien a favor! What figurative term is being used in this sentence?

The figurative term being used in the sentence is "Scrooge".

This term is allusion

Explanation:

Scrooge is a very grumpy character from the novel "A Christmas Carol" so when the sentence referred to "Scrooge" the person was calling the other character grumpy or bad-tempered.  

Researchers from the Universities of Wyoming and Florida, in the US, carried out a series of studies in Laikipia District in Central Kenya, and Tsavo National Park, also in Kenya.

Tree cover was decreasing while elephant numbers were increasing. Tree cover stayed the same where elephants were excluded using a high electric fence that other animals can cross.

Elephants are very effective at stripping trees' bark and destroying them while feeding. "The number of elephants in the central highlands of Kenya has become high enough in recent years that we see severely elephant-damaged trees all over the place these days

Explanation:Hope this Helps