Some bacteria live in the human digestive tract. Here bacteria finds a good environment to obtain nutrients. Humans improve the health of their digestive tract due to the presence of this bacteria
A. predation
B. commensalism
C. parasitism
D. mutualism

maritime tropical may be your answer.

b ti isnfornopgnoernfrof

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.