Which of the following changes will usually speed the reaction rate of a chemical system? question 7 options: decrease the pressure of a system increase the concentration of a reactant increase the concentration a product decrease the temperature of the system

a. decomposes use carbon from dead organisms as fuel for cellular respiration, returning carbon dioxide back into the atmosphere.

the correct answer is option b

behavioral response need communication and thus co-ordination at several levels such as interaction among cells, organ system and the entire organism.

behavioral response produces both internal and environmental stimulus.