Which activity is best described as a scientific endeavor?

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.

because they are eaten by the frog and the frog getseaten by the snake and the snake by the eagle

true                                                                                                       true true true true true true

what is shown in the image?

eukaryote

chloroplast

mitochondrion

submitted