Question

natural selection results in change over time by acting on traits that are

better than the best

heritable

new

unique

Explanation:

Natural selection requires traits to be passed from parents to offspring (heritable) to cause population changes over time. Non-heritable traits cannot be selected for or against across generations. The other options ("better than the best," "new," "unique") are not necessary for natural selection to act.

Answer:

B. heritable