What is true of a chemical reaction?a. Products and reactants must be balanced. b. Subscripts must be used with all products and reactants
c. Energy must be included in the beginning of the reaction
d. Coefficients must be used with all products and reactants​

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.