Answer:
conduction
Explanation:
Since ectotherms lack the capacity to generate heat within their body, one of the mechanisms they use in generating heat from the environment in order to maintain constant body temperature is, energy transfer by conduction. Conduction occurs when a lizard lays directly onto a hot rock.
Heat from the sun is transferred to the rock by radiation as the rock absorb the heat energy. This heat that is radiated in the rock is then transferred to a lizard that lays on it through conduction, and as the lizard absorbs this heat from the rock, they become warm.