What one of the following items is a producer of pollution?
a. forest
b. oceans
c. factories
d. bicycles user: how many times in the history of earth has the number of species dropped drastically?
a. 4 times
b. 3 times
c. 5 times
d. 6 times

true is the answer : )

a. the production of carbon dioxide through the process of photosynthesis

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.

cell/ tissue/ organ/ organ system/ body