The number post-reproductive age group will decline in number in a population pyramid.
<h3>What is a population?</h3>
A population is a group of organisms of the same same specie living in a defined area of a given habitat.
A population pyramid shows the number of organisms of age groups in a population.
The post-productive age group is characterized by individuals that are too old to have children.
Since they are too old to have children, the post-reproductive age group will decline in number.
Learn more about population at: brainly.com/question/25896797
Sigmund Freud: The unconscious mind governs behavior to a greater degree than people suspect.
Rosalind Cartwright: Dreams simply reflect life events that are important to the dreamer.
Hope this helped!
-TTL
Answer:
D. it takes millions of years to form
