Question

b. when organisms with helpful traits survive and reproduce more.
c. when organisms choose their traits.
d. when people breed animals for certain traits.

1. what happens to traits that help an organism survive?

a. they disappear over time.
b. they become less common.
c. they become more common in the population.
d. they never change.

Explanation:

The question is about traits that help organisms survive, which relates to the concept of natural selection in Biology (a subfield of Natural Science). Traits beneficial for survival increase an organism's chances of reproducing, so these traits are passed on more, making them more common in the population over time. Option A is wrong as helpful traits don't disappear. Option B is incorrect because helpful traits should become more common. Option D is wrong as traits can change over generations. So the correct answer is the one stating such traits become more common.

Answer:

C. They become more common in the population.