It is an exclamatory sentence it should end in (!)
It is a person, place, or a thing. So your answers would be: tables, chairs, mum, wall, fist
The main idea of this paragraph is that, without cells, there would not be any organism. As it is said, according to biologists there are<u> five levels </u>of cell organization in organisms, which, working together as a colony, can form from tissue to a whole body system able to live by itself.
(D) it should be in the last sentence of the introduction paragraph.
I believe this is what my study unit said, so I hope it helps
Cylinder Volume = pi × r² × h
r = radius
h = hight
Volume = 54 pi (given)
r = 3 , r² = 9
54 pi = pi × r² × h
54 = 9 × h
h = 6 cm