Do we need greenhouse gases on Earth? Yes - they get rid
of all harmful
gases on our
planet
No - they only
block some of the
Sun's rays
No - they only
cause terrible
climate change
Yes - they keep
the Earth warm
x

No they cause climate change

Explanation:

No

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:

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).