Question

1 fill up
1. sound is a kind of energy
which produce a
2. Human caudible range is
3. Earth is the only on which life
is the outer crust of our planct.
5. Composition of Nitrogen in air is
u​

Answer 1

Answer:

all of these

Explanation:

please like and follow

i give all questions answer

Answer 2

Answer:

1) sensation of hearing.

2)20Hz

3)planet

4) 72percent