How do wind and water change rocks over time?

A) They add minerals to the rocks
B) They change the shape of the rocks
C) They increase the mass of the rocks
D) They build up the rocks with small sand particles

In the practice of science, this type of reasoning is used to develop explanations.

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

Kudzu vines grow by climbing and wrapping around trees. trees covered by kudzu can die because they are starved of sunlight. what type of relationship exists between the trees and the kudzu growing on them?