4. Years ago, hunters near Yellowstone did not like wolves that competed with
them for deer and elk kills. Wolf hunts reduced the population to near
extinction, but the elks did not increase in number, and in some areas, their
numbers declined when food sources ran out. What suggestion would you make
to restore the ecosystem in that area? I

MY suggestion to restore the ecosystem of this is:

The suggestion here would be to ban hunting until the numbers of all the animals made them capable of living with the resources the area had to offer and then allow controlled wolf hunting or relocation.

Explanation:

The reasons behind this answer are that elks population reduced because they exhausted their food sources. Therefore humans can't hunt them right now, or they will go extinct in the area. Also, we don't know anything about deers. But we do know about wolfs and they almost reached extinction, so we have to rescue them until their population can inhabit the zone without risk of extinction and only then hunt them or relocate them. Because they will be necessary to keep elk numbers reduced so they can't exhaust their food resources again.

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the present continuous is a verb tense which is mainly used to indicates that an action is in progress at the moment of speaking.  

it is formed using: person + verb to be (am/is/are) +verb + - ing form  

example: i am studying at this moment .

in addition, the present continuous is also used in order to express things that will or will not happen in the near future.

example: i am having dinner with some friends tonight.

the speaker sometimes   uses it   to express that an action is repeated and it causes irritation on the part of the speaker

example: my sister is constantly complaining about everything.