What is natural selection? in your own word

What is the problem in this article? what solution does the article propose?

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

In pea plants, yellow seed color (y) is dominant and green seed color (y) is recessive. based on the punnett squares, what are the chances that the offspring in the second generation will have green seeds?