Which of these sentences uses the word good correctly? A. He did good in the tournament. B. The athletes eat good when they are training. C. She was a good student. D. Keira plays the oboe really good.

Not all of the individuals survive or reproduce.

Explanation:

With limited resources, there are scarce food, sexual couples or land available to settle. In consequence, this is explained by the theory of Natural Selection. This theory exposes that it is a phenomenon of evolution that is defined as the differential reproduction of the genotypes of a biological population.

source: On the Origin of Species. Charles Darwin. Available at: http://darwin-online.org.uk/content/frameset?itemID=F373&viewtype=side&pageseq=1