A)Demographic; because the census studies things such as births,death, and even disease which show changes in human population
<span>Located down within the foot, the calcaneus is better known as the heel bone. It is situated in the back of the foot and it is here, in the calcaneal region that it is the only visible on the dorsal body surface.</span>
D. the white blood cells of the immune system fight and destroy pathogens
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To make an animal or a plant breed with a different type of animal .
Advantage of Cross Breeding:-
Desired characters of male and female Parents can be embodied into the cross bred offspring.
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