Biology

The correct answer is: B.random mutations.

Explanation:

New traits arise primarily due to random mutations in the genetic material of organisms. These mutations can lead to changes in traits, and these changes can be passed on to future generations. Not all mutations lead to noticeable traits, but those that do can contribute to genetic variation within a population.

Here’s why the other options are incorrect:

A.The need to survive: Traits do not arise because of a nee...