The canal connecting the third and fourth ventricles and running through the midbrain is the interventricular foramen a. True
b. False

the answer to you question is   jet streams

b. the carbon cycle ensures living things have a source of hydrogen

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation: