Answer:
A. Predation
B. Competition
C. Limited Resources
Explanation:
ABC are negative factors so they can lead to natural selection. D is a positive factor that will not lead to natural selection.
In cell biology a centriole is a cylindrical cellular organelle composed mainly of a protein called tubulin. Centrioles are found in most eukaryotic cells. A bound pair of centrioles, surrounded by a shapeless mass of dense material, called the pericentriolar material (PCM), makes up a structure called a centrosome.
A) both have strong scientific support.