What are the building blocks of life?

Question

1.cells
2.lungs
3.organs
4.tissues

Answer 1

Hello guys! I just finished the test here are the answers.
1. A
2.B
3.D
4.B
5.C
6.D
7.C
8.B
9.B
10.A
11.B
12.D
13.C
14.A
15.D

Answer 2

It's a 100% btw

Answer 3

Emily is right.