Ans.
Endocrine system is a body system that consists of hormones, a group of glands, and secret those hormones into bloodstream directly to regulate the functions of target tissues or organs.
Endocrine system maintains homoestasis by regulating temperature of the body. When there is a rise in body temperature, the endocrine system sends information from hypothalamus to muscles, glands, organs, and nervous system that help to return the temperature into normal level.
Thus, the correct answer is option). 'passing information about body temperature from the hypothalamus to the sweat glands or muscles.'