B. Hypothesize how small changes in energy use can make a significant difference in CO, emissions.

small changes of energy can create such a big difference in co emissions. As we use less energy the amount of harmful gases that are produced from them will lower, therefore creating a smaller amount of greenhouse gases/ CO into the atmosphere.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.

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