Answer:
Explanation:
Ectotherms are those animals whose body temperature increases and decreases along with the temperature of their surroundings. Examples are reptiles, amphibians. Ectotherms such as lizards, snakes regulate their body temperature not by producing metabolic heat but they follow other ways. One such way is by going into sleep, winter sleep (hibernation) and summer sleep (aestivation).
D. Losing some of its fertility because of overgrazing
It might be D considering the location.
1. <span>the process started with the collapse of a nebula
The universe almost certainly didn't start from the collapse of a nebula.
2. The mantle is the middle layer.</span>
