Could someone please check my grammar homework? The words in bold are my answers ​

For in this unit, you read about transitions of power and the formation of newly independent nations in africa, asia, the americas, and the middle east. some of these transitions were peaceful, while others caused long-term instability. why do you think some countries were more successful than others with political transitions? what do you think were the biggest challenges facing newly independent countries? would it have been possible for leaders to prevent these problems before they happened? why or why not?

Explain one major pattern of cultural interaction between nomadic and sednetary socities in afro eurasia before 1450 ce

What did the marshall plan do ? apex a.send aid to countries in europe b.sent atomic weapons to asia c.sent more ships to the pacific d.sent aid to the soviet union answer ; is a