Question

hi. It is time for today's question. The answer to the last two questions will be given now.
1)as 1=5
5=1. (the accurate answer is not given by people)
2) leap year (right answer given)

The question is---
We don't get sound when muscles move. But we hear a lub dub sound saying her heartbeat. Our heart is surrounded by muscles. So, it is not the sound made by the heart ❤️. Then what makes this sound. Give accurate explanation as it is for 25 marks. All the Best for quiz. Follow me for updates​.​

Answer 1

Explanation:

SORRY I DON'T KNOW THE ANSWER...

PLEASE DON'T MIND....

Answer 2

Answer:

when heart is beating like lub dub muscles around the heart moves .with this moments we can hear the lub dub sound