Which of the following is an example of a learned behavior? A. A bird feeding its young B. Human toddlers walking C. A child recoiling from a hot stove D. Squirrels opening nuts Please select the best answer from the choices provided A B C D.

B. Human toddlers walking

Explanation:

A bird feeding its young is innate, their kids need to eat and communicate it to their parents.

A child recoiling from a hot stove is a reactive behavior, they're not going to learn how to lift their hand from the stove, it's hot, they're going to move.

Squirrels opening nuts is also innate, they need food and opening nuts is how they get food.

Therefore the answer is B, human toddlers learn how to walk.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."