Question

how do animals get thier carbon? choose all that apply. by eating plants. by eating animals that eat plants. by eating air. by eating sand.

Explanation:

Plants take in carbon dioxide during photosynthesis and build carbon - containing molecules. Animals that eat plants (herbivores) directly obtain carbon from the plant matter. Animals that eat other animals (carnivores or omnivores) get carbon by consuming the bodies of the animals that ate plants. Air mainly consists of nitrogen and oxygen (with a very small amount of carbon dioxide, but animals do not "eat" air in the sense of obtaining carbon for their body building). Sand is composed of minerals like silicon dioxide etc. and does not provide carbon for animals.

Answer:

By eating plants.
By eating animals that eat plants.