Answer:Eating salty food causes what kind of thirst
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
A - has a low diversity of genes therefore they are having issues w the breed not becoming strong but instead weaker
Because since developing countries are still growing, when they finally get to the level of some more advanced countries the country as a whole feels a "greater growth"
D. Man-Made is the answer