Structures that appear to have lost size and function over the proposed evolutionary history of an organism are called

The answer is b, as with an inference you make a statement with no evidence

A  reaction  in which  energy  is  released  to the surroundings is called an exothermic  reaction. in this type of  reaction  the enthalpy, or stored  chemical energy, is lower for the products than the reactants. when ammonium nitrate is dissolved in water,  energyis  absorbed  and the water cools.