Why might an overactive thyroid make a person skinny? A. it could make the person feel sleepy and less energetic
B. it could make the person want to do more exercise.
C. it could make the person's body absorb calories more quickly
D. it could help the person eat less fattening foods.​

i think A

Explanation: the thyroid uses the calories so an overactive thyroid would use those calories more quickly, causing the person to lose energy and feel tired.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

correct answer is a. and d.