Which one of these best describes an organic compound? ?

1. carbohydrates

2. water

3. carbon dioxide

i understand that an organic compound is any chemical compound that contains carbon bonded to at least one other atom (usually hydrogen)
and isn't true that carbon and carbohydrates contain carbon? ? or am i getting this mixed up..this is pretty confusing. also i'm doing this in biology, but we're getting a basic foundation of chemistry.
in advance, though!

Hurry i need your (100 points) 1) what are the responsibilities of the region of the brain highlighted below? (picture located below) the highlighted portion is at the rear base of the brain, behind the brain stem. regulating homeostasis, hunger and eating, thirst and drinking, and many other functions of basic survival. coordinating movement and balance by using information from sensory nerves, including hand-eye coordination. controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities. regulating important involuntary bodily functions such as blood pressure, heart rate, breathing, and swallowing. 2)which of the following systems or structures is correctly paired with its function? neurons - brain cells that control thoughts, calculations, and memory cerebral cortex - portion of the brain that controls involuntary body movement peripheral nervous system - carries impulses to and from the central nervous system central nervous system - carries information from the nerves to the muscles and glands

Which term most precisely describes the cellular process of breaking down large molecules into smaller ones? a) catalysis b) metabolism c) anabolism d) dehydration e) catabolism

24. how are vaccines used to keep people healthy?