When would be a good time to use conversational English? in a thank you note to a friend
in a letter to your Congressperson
in a research paper
in an online review of a product

These two elements threaten ecosystem biodiversity.

Write a short summary that includes the major claims and reasons of johnson's argument.

During sensitive periods of brain development like cell migration the brain is vulnerable to effects like: a. malnutrition b. infection c. toxins /drug use d. b and c e. all of the above