Answer:
The four parts of a control system include the controller, amplifier, actuator, and lastly, feedback.
Naturally occurring compounds in earth are called salt
Try Viscosity...tell me how you do!:)
Answer:
The greatest diversity of amphibians is in tropical forests.
Explanation:
Because amphibians have highly permeable skin and spend a portion of their lives in water and on land they need the the prevalent humidity of the tropical habitat which enables them to occupy a much wider range.