In 1986 several robotic spacecrafts were sent into space to study the halleys comet. which of these statements best explains why humans should continue to send robotic spacecrafts into space?

a) they absorb harmful radiations in space
b) they change weather conditions on earth
c) they discard some myths about objects in space
d) they destroy meteors and comets which might strike earth

C) they help discard some myths about objects in space

Explanation:

This is the only one on this list that would be possible currently.

correct answer is option a.

tropopause, stratopause and mesopause have all in common aspect that is point of maximum temperature in its layer of the atmosphere. all layers of atmosphere observe abrupt change in temperature. tropopause is the boundary between troposphere and stratosphere. stratopause is the boundary between stratosphere and mesosphere. mesopause is the boundary between mesosphere and thermosphere. these all boundaries are ranges between altitude of 0 to 80 km.

option a and d is the correct answer

i hope this u

plz mark as the brainliest answer