Answer: Estivation
Explanation:
Non-mammalian animals that cannot maintain their body temperature by its own. They need to adapt certain phenomenon to survive in the existing conditions.
The animals in the desert like snakes, reptiles, North American tortoise, also maintain their body temperature and maintain an adequate amount of water inside the body.
The animals in the desert do not move out during the daytime in order to conserve water and energy.
This phenomenon is season and is known as estivation.
If the earth wasn't spinning , we wouldn't have summer, winter, fall, spring etc, it is important because we need the sun for certain seasons and no sun for others.
Answer:
a. When a fetus is 13-15 weeks old
Explanation: is correct
