Answer: Ectotherms depend mainly on external heat sources, and their body temperature changes with the temperature of the environment. Animals exchange heat with their environment through radiation, conduction—sometimes aided by convection—and evaporation.
How doth the little crocodile
Alliteration is the repetition of a word of sound within the same phrase, such as "Ulalume"; Asonance is a vowel coincidence in the termination of two words, such as "it was night in the lonesome october
of my most immemorial year"; the consonance is an unmotivated use of words that are very close for each other, such as " we noted not the dim lake of Auber- (though once we had journeyed down here)"; and the poetic image describes something real through words, such as "these are days when my heart was volcanic", which explains his heart beats too strong.
Answer: I'm gonna guess simile since you didn't show us the paragraph.