The factor(s) that to perpetuate temperate grasslands, such as the american prairies, and prevent them from becoming woodlands include

The factor(s) that help to perpetuate temperate grasslands, such as the American prairies, and prevent them from becoming Woodlands include seasonal droughts and frequent fires.

Its led to migrationits led to death 

Hello,the first women to become a astronaut was  valentina tereshkova, but she never land the  moon : dhope this -hottwizzlers