Match the layers of earth with their most significant dynamic quality.
1. core
2. mantle
layer where convection currents
circulate, driving plate tectonics
source of earth's internal energy
and magnetic field
layer where tectonic plates collide,
spread, and rub, creating surface
features and events, like volcanoes and
earthquakes
3. crust

d

explanation:

the higher the instrument the better

well we can't tell you because we cant see the time give a screen shot or something.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.