The term 'Things That Cause a Response' can be summarized as STIMULI, which is a seven-letter word. STIMULI are any type of environmental or internal factor that causes a response in an organism. STIMULI can be physical, such as light, sound, and temperature, or they can be chemical, such as hormones or neurotransmitters. STIMULI can also be psychological, such as memories or emotions. In all cases, the response to a stimulus is an adaptation that helps the organism survive and thrive.