What is a substance that provides the host immunity by introducing a weakene (attenuated) or killed (inactive) version of a virus?

Vaccines are the substance that provides immunity to the body by introducing a weak or dead virus.

Explanation:

Vaccines are not the medicines which helps in the prevention of disease in animals. Vaccine contains weak or dead microorganisms when injected in our body. Our body makes antibodies according to the structure of microbes which are injected. So whenever, the microbes enter into the body, our body is prepare for it. So the microbes cause no or less damage to the body.

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.