Answer:
scientist to scientist is the correct answer.
Explanation:
The answer would be c - interjection. Interjections are words or phrases that express emotion. Examples would be wow, awesome, ummm, etc. These are not appropriate for formal writing but used constantly in daily communication.
1-A Generosity
2-C The swallow dies
3-B Live life to the fullest
4-B Machine
5-A Joke: Laughter
Hope fully this helps you if not let me know.