In the United States, summers are warmer than winters because ...

[bclement10]

In the United States, summers are warmer than winters because
 
  A) the Earth is much closer to the sun in summer.
  B) the northern hemisphere is closer to the sun.
  C) the sun's rays shine more directly onto these regions in summer.
  D) there are usually fewer clouds in the troposphere in the summer.

Question 2

Domestic and feral house cats in the United States
 
  A) are a keystone species, controlling potentially huge populations of rodents.
  B) provide the necessary population control for pigeons, starlings, and cowbirds.
  C) kill more than one billion small mammals and birds annually.
  D) spread viral infections to native carnivores.

[matt]

Answer to Question 1

C

Answer to Question 2

C

[bclement10]

Wow, this really help

[nguyenhoanhat]

Gracias!