Which three organ systems work together to take in oxygen and other nutrients and deliver them to an animal's body cells?
A. Digestive, because it breaks down the nutrients in food into
substances that can be used by cells
B. Respiratory, because it takes in gases from the external
environment
I c. Circulatory, because blood absorbs nutrients and carries them to
other cells
OD. Nervous, because it controls the body functions and responses to
stimuli

Digestive , circulatory. And respiratory

Explanation:

Your digestive system absorbs water and nutrients from the food you eat.

Your circulatory system carries oxygen, water, and nutrients to cells throughout your body.

Wastes from the cells are eliminated by your respiratory system, your excretory system, and your skin.

•there must be variation for the particular trait within a population.

•the variation must be inheritable (that is, it must be capable of being passed on from the parents to their offspring).

•individuals with one version of the trait must produce more offspring than those with a different version of the trait.good

explanation:

compost can be added to topsoil as a:

pesticide