What type of intrusive igneous rock texture has the largest crystals? a) aphaniticb) pegmatiticc) phaneriticd) porphyriticthe answer is b. i got this question right.

the answer is B thats what u said so

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.