Question

lie out in the sun to warm itself up. which term matches the picture? endotherms ectotherms

Explanation:

Endotherms are organisms that can internally regulate their body temperature. Horses are mammals and mammals are endothermic. Ectotherms rely on external sources (like the sun) to regulate body temperature. The text mentions "lie out in the sun to warm itself up" which is for ectotherms, but the picture is of a horse (an endotherm).

Answer:

endotherms