Question

1. read the sentence below. which word would best replace the underlined phrase to create a more professional and formal tone? scientists are trying to make penguin habitats better to help save endangered species. scientists are trying to fix penguin habitats to help save endangered species. scientists are trying to make penguin habitats bigger to help save endangered species. scientists are trying to build penguin habitats to help save endangered species. scientists are trying to improve penguin habitats to help save endangered species.

Explanation:

To make the sentence more professional and formal, "make... better" can be replaced with a more precise and formal - sounding phrase. "Improve" is a more appropriate and formal word in this context compared to "build" (which implies construction), "make... bigger" (which is more about size), and "fix" (which implies repair).

Answer:

"Improve"