The rock and fossil record shows that

a.

the earth has not changed very much over the course of its history.

b.

all of the changes during earth's history have been very sudden.

c.

both gradual and sudden changes have occurred during earth's history.

d.

all of the changes during earth's history have been slow and gradual.

both gradual and sudden changes have occurred during Earth's history.

Explanation:

did it on study island

chordata is the answer

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: