Jenny is running for more than an hour an on a pleasant sunny morning. Her body is sweating to maintain homeostasis, which is caused by the action of a/an

increased body temperature

Explanation:

The sweat that Jenny produces while she is running, to maintain homeostasis is caused by the action of a control center, specifically sweat control center.

A natural response of the body to prolonged physical exercise is the increase in body temperature, a stimulus that activates the sweating process.  Through sweating, the body loses heat through the evaporation of the liquid that covers the skin, being a mechanism to control body temperature.

(Hope this helps can I pls have brainlist (crown)☺️)