Question

complete the sentence below by selecting the correct words from the drop-down menus. factors that affect natural selection include variation, drop-down menu with options underpopulation, overpopulation, and drop-down menu.

Explanation:

In the context of natural selection, a key factor is overpopulation (as it leads to competition for resources), while underpopulation does not drive selection pressure in the same way. The other main factors with variation are overpopulation and differential survival/reproduction (though the third dropdown's options aren't fully shown, for the second dropdown, overpopulation is correct).

Answer:

The second dropdown should be: overpopulation