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.”

Explanation:

"Endangered species" is the most formal and professional - sounding term among common options for referring to species at risk of extinction. It is widely used in scientific and conservation contexts.

Answer:

No change needed (as "endangered species" is already formal and professional)