There is a reduction in the BMR(basal metabolic rate) of amphibians during winter because:

• A. The amphibians are endotherms and they decrease their metabolism during winter
• B. The amphibians are ectotherms and they hibernate during winter
• C. The amphibians cannot get the required nutrients during winter
• D. The rate of blood flow is increased in amphibians during winter

Answer: (B)