Answer the following question given this paragraph: 

45.7 Behavioral Biology: Proximate and Ultimate Causes of Behavior Behaviors are responses to stimuli. They can either be instinctual/innate behaviors, which are not influenced by the environment, or learned behaviors, which are influenced by environmental changes. Instinctual behaviors include mating systems and methods of communication. Learned behaviors include imprinting and habituation, conditioning, and, most powerfully, cognitive learning. Although the connection between behavior, genetics, and evolution is well established, the explanation of human behavior as entirely genetic is controversial.


Q: Behaviors are responses to stimuli. they can either be instinctual/innate behaviors, which are not influenced by the environment, or learned behaviors, which are influenced by this?


A:
environmental changes