1)

farming varies around the world because of across space.

a.
cultural and economic factors

b.
cultural and environmental factors

c.
farmers' personal preference and environmental factors

d.
weather and climate

e.
climate change

2)

the earliest known domesticated wheat, barley, and rice crops are thought to have originated in asia about

a.
10,000 years ago.

b.
100,000 years ago.

c.
1.1 million years ago.

d.
1,000 years ago.

e.
10 million years ago.