Which statement about a dichotomous key is true?
A dichotomous key is based on the temporary actions of an organism.
A dichotomous key may include a question that has three or more answers.
A dichotomous key may have a group with no organisms in it.
A dichotomous key is complete when each organism stands alone.

A dichotomous key is complete when each organism stands alone is the correct answer.

Explanation:

Dichotomous key helps scientists and biologists to known the identity of the various unknown things present in a natural world such as mammals, trees, fish, rocks, reptiles.

This tool is used to recognize and classify an organism based on their characteristics and it helps to provide a correct name to an organism that differentiates the organism from the other objects.

The dichotomous key identifies the individual species, objects, or organism with its scientific name.

the answer is: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall.