They all need to have their last names.
Main Idea: The main idea is that tigers are going extinct but now acts are being done to help this from happening.
SD1: "A study released that the world's wild tiger population has risen for the first time in century"
I can't figure out the other 2 details.
Sorry.
I think the answer is noun.
Answer: in my opinion teachers are better because discovers wouldn’t be helping or working as doctors because teachers are the ones that gave the education and smartness to doctors
Explanation:
Hope it helps
I'm not exactly sure, but to use common sense, I'd say eye-contact. You explicitly said, "nonverbal," and eye-contact is the most reasonable one.