<span>i think is this one -adoption of a social caste system </span>
Answer:
One of the things that motivated American Imperialism is economic. During that time, the US was already gaining industrial power, which means that they were trying to find new markets to sell their goods. Another motive that led to imperialism was military power.
Explanation:
Because we humans are made from zygote which is formed by a combination of two haploid gametes !!
When the sperm and ova meet there is a crossing over type phenomenon which decides what will be the phenotype !! so we somewhere distinct from both our parents !!
Prevent the incalculable loss of life it would take to invade mainland japan.