Why might reflexes with which infants are born go away after three to six months?

Reflexes develop gradually, in proportion to the growth process.

Explanation:

Still, newborns have a few reflexes. Among the innate reflexes in newborns, there are several examples, such as sucking reflex, grasping reflex, auto-walking reflex, Moro reflex and asymmetric reflex. These are just some of the significant reflexes a baby is born with, and they are all essential for the future development of newborns. If your baby does not respond to one of these reflexes in the early days, it is a sign that something is wrong.

i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years