Because Theyr lungs don’t get enough air they are supposed to
The chemical composition of bone is made up of collagen and calcium, which makes bones stronger
Selective breeding
In selective breeding, the
desired genes from one organism are combined with genes of another
organism, resulting in a new combination of genes.
The selective breeding is quite voluntary and is not necessarily natural or congenital. It is the act of how people or individuals can choose traits in the gene pool of their choice to produce their desired or goal organism in the process. This trait is influenced in the host of the specific sperm and egg cell which makes up the chromosomes.
Soil?
The atmosphere?
Air?
I don't understand how you want this question answered
Some abiotic factors that can limit a population are space and weather these are called limiting factors (and how much water is provided)