Pulmonary vein
Aorta
Pulmonary artery
Vena cava
<span>If an animal learns to use a tool in one way and then is presented with a new situation in which it applies the tool, the animal is demonstrating
a. imprinting.
b. operant conditioning.
c. classical conditioning.
d. insight learning.</span>
The word is <u>an individual</u> of a species
The answer would be C. Energy is used through the food chain so energy always decreases. Population size would commonly decrease according to the pyramid of food chain but since there's no answer for that, C would be the most suitable