Differenciate between a medium and long term goal​

So Medium-term goals may take from two months to three years to achieve. Long-term goals require three or more years to achieve. And also Long-term goals may be built upon short-term goals.

Explanation:

Medium-term goals may take from two months to three years to achieve. Long-term goals require three or more years to achieve. Long-term goals may be built upon short-term goals.

the correct answer is:

a population changes in response to a change in the environment.

b exhibiting favoritism toward the kikuyu people.