Among these choices, the most energetically efficient locomotion per unit mass is likely ________.
A) running by a 50-gram rodent
B) running by a 40-kilogram ungulate
C) flying by a 100-gram bird
D) swimming by a 100-kilogram tuna (bony fish)

Question

Quizplus · Accepted Answer

Swimming by a 100-kilogram tuna is the most energetically efficient because water supports the body, reducing energy expenditure compared to running or flying.

Among These Choices, the Most Energetically Efficient Locomotion Per Unit