How did american expansion affect the spanish in the 1800s

in the Spain country the flu it came in 1920 it is a looks like coronavirus but the people are from viruses 900 people are die and 10 people are got affected but scientists they check what happens in so many years in Spain scientists are telling that this is name is coronavirus that means it is a dangerous virus ever which people are got affected

b. great plains

hope this

the correct answer is b, "fertility rates are increasing, so populations will grow more quickly in the future."