Answer:
D.) Amino Acids
Explanation:
Please see picture attached to this answer.
Layer D is the youngest layer
The process of ovulation and menstruation in women and other female primates.
When we breathe, our respiratory system takes up oxygen and carbon dioxide or other useless gases go out . The oxygen combines with the haemoglobin in the blood of the circulatory system . This is transferred to all the cells of our body to get energy.
C.<span>trees going dormant in winter to survive unfavorable conditions</span>