The correct answer is A. some energy is wasted as heat.
Energy is transferred between organisms through the food in a food chin. Food chain begins with producers. They make food using solar energy. They are eaten by primary consumers which are in turn eaten by secondary consumers and so on. Large amounts of energy are lost from the ecosystem when energy is transferred from one organisms to the next. In biologic systems, large amount of energy is lost as metabolic heat when the organisms are consumed by the next level.
Adaptation because organisms adapt to avoid extinction.
An imbalance in blood glucose levels causes "C. diabetes" although is should be noted that it takes a prolonged and special kind of imbalance. Brief imbalances won't cause diabetes.
