Why did the large animals like the mastodons begin to die out?

earth's climate changed
man kind over hunted them
their food source died out

Question 10 of 102 pointswhat was one major effect of the spread of railroads throughout great britainduring the industrial revolution? oa. factories were able to more easily ship manufactured goods tomarkets across the country. ob. agricultural production fell substantially due to farmland beingreplaced with railroads. oc. steam engines fell from popularity due to railroads' reliance onalternative energy sources. od. iron replaced coal as the most important raw material produced ingreat britain. submit

To keep other european powers from threatening its empire in america, spain sent soldiers, settlers, and?

Afamous line of latitude is the north pole. true or false