The Earth's orbit around the sun would be the correct answer to that. :) Good Luck
Answer:
D
Explanation:
to maintain homeostasis the blood vessels in your skin dilate to allow more blood flow to the surface of your body where it disperes the heat.
Do you have a photo of your question
Answer:
Option A, oxygen in the atmosphere
Explanation:
The highest level of oxygen reached during this phase of the geological cycle of earth. The oxygen level in Carboniferous period accounted for 35% as compared to 21% of oxygen in the atmosphere in present time.
Due to high oxygen content, the giant and wide varieties of terrestrial animal and plant species evolved. For example – size of insects and carwlies increased, plant became extremely giant, increase in number of tree ferns etc.
