The high temperature in the upper thermosphere: a. produces a tremendous amount of heat transfer. b. would feel cold to humans due to few molecules for heat transfer. c. is produced primarily by the increased molecular activity of argon and helium. d. is more a measure of sensible temperature than kinetic energy. e. is produced by the absorption of UV radiation.

e. is produced by the absorption of UV radiation.

Explanation:

The thermosphere is a layer of Earth's atmosphere which is directly above the mesosphere and below the exosphere. It extends from about 85 to 500 km altitude above the earth.

In the thermosphere, the temperature is strongly dependent on the level of solar activity. When the Sun is very active and emitting more high energy radiation, the thermosphere becomes hotter by X-ray and UV radiation absorption.