Help me to answer this pls

Answer:
1. 2
2. 2
3. 1
4. 2
5. 3
6. The number of waves that pass a point in a second
7. How close the waves are to each other
Explanation:
also, check out this answer key if you need it:
https://rmsteam72.weebly.com/uploads/1/2/7/2/127288658/waves_worksheet_answer_key.pdf
stay safe out there.