Define the following terms:
$(1)$ Plant hormone (Phytohormone)
$(2)$ Deciduous

(N/A) $(1)$ Plant hormone (Phytohormone): These are chemical substances produced naturally in plants that act in very low concentrations to regulate growth,development,and physiological processes. Examples include Auxins,Gibberellins,Cytokinins,Abscisic acid,and Ethylene.
$(2)$ Deciduous: This term refers to plants (typically trees or shrubs) that shed their leaves annually,usually during a specific season such as autumn or during periods of drought,to conserve water and energy.