decide which examples are most likely to increase variation or decrease variation. Some examples could do both. Which of the following could possibly increase gentic variation indirectly

The following could possibly increase genetic variation indirectly is  Increase food supply , Toxin , and New habitat.The following information should be considered;Genetic variation means the diversity in gene frequencies. Genetic variation could also mean that differences between individualsor to differences between populations.It could be increased by the above reasons. 

Explanation:

the answer to your question is sperm