Tall trees grown around agricultural fields can
a. buffer the effects of wind
b. accelerate soil erosion by blocking in the land
c. prevent water runoff
d. decrease erosion losses by grazing animals

The soviet union beat the us to the first successful launch, with the october 4, 1957, orbiting of sputnik 1, and later beat the us to have the first human in earth orbit, yuri gagarin, on april 12, 1961. the "race" peaked with the july 20, 1969, us landing of the first humans on the moon with apollo 11