Butyl rubber and EPDM (ethylene propylene diene monomer - a synthetic rubber) are the two best flexible liners for water garden construction. Each of these materials is UV stable and should last 20 years or more. EPDM and butyl rubber are generally available in 45 mil and 60- or 30-mil thicknesses, respectively.
human behavior. The capacity of mental, physical, emotional, and social activities experienced during the five stages of a human being's life-prenatal, infancy, childhood, adolescence, and adulthood.
But we need to have some definition of behavior and so here is my two cents worth on the matter: I suggest a slight modification of the definition proposed by Levitis and his colleagues, namely that behavior is the coordinated responses of whole living organisms to internal and/or external stimuli.