A force where an object is attracted to a magnet. A. Gravity B. Magnetism C. Friction D. Position

The answer is A. Gravity

Explanation: Magnetic force is a force, like gravity, that is able to act across a distance without touching an object that is attracted by it. Magnetic attraction is a pulling force.

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.

i think its the first one