3. why is america considered a "melting pot of cultures?

This implies that both a melting of cultures and intermarriage of ethnicities, yet cultural assimilation or acculturation can also occur without intermarriage. Thus African-Americans are fully culturally integrated into American culture and institutions.

i believe it is

1. 저는 사과를 머거요.

2. 너는 자야지.

3. 재석는 앉어 있었다.

lab rats that ate more artifical sweeter gained more weight than those who ate sugar and they had “lower levels of a hormone called glp-1, which affects how full we feel.”