Regulation of body temperature in homeotherms during high environmental temperature involve

Explanation

Homeotherms, or warm-blooded animals, maintain a constant body temperature regardless of environmental changes. During high environmental temperatures, several physiological adaptations occur to facilitate heat dissipation. Vasodilation helps increase blood flow to the surface of the skin, promoting heat loss. Lowering the hairs minimizes insulation provided by the fur, enabling more heat to escape. Reduction in sub-cutaneous fat also reduces insulation, allowing better heat dissipation. Therefore, the correct answer is All A, B, and C as each option represents a mechanism that aids in cooling the body. Each of these processes contributes to the effective regulation of body temperature in hot conditions.