Research shows that people who feel they have some control over unpleasant events tend to show than those who feel they have no control.

A) higher blood pressure
B) more ulcers
C) higher stress levels
D) lower stress levels

D

Explanation:

A and C are closely related, because high blood pressure follows stress. B is incorrect because ulcers come from the disintegration of tissues, commonly in the stomach. Somebody who has control over unpleasant events would likely be less stressed than somebody who feels that they have no control over their circumstances.

answer: c

explanation:

primary succession occurs in essentially lifeless areas regions in which the soil is incapable of sustaining life as a result of such factors as lava flows, newly formed sand dunes, or rocks left from a retreating glacier. secondary succession occurs