You want to go swimming, but there is no lifeguard at the beach right now. You are not a good swimmer. The safest thing to do in this situation is to swim only where you are able to stand

swim only with a lifeguard present

swim with a flotation device

swim with a friend in deep water

Asimply means that over time there was some sort of change.

What is a neurotransmitter involved in mood reward, addiction, and motor behaviors?

Beryl states that insulation with the smallest possible thermal conductivity is best to keep a house warm in winter, but worst for keeping a house cool in summer. sapphire insists the reverse is true: low thermal conductivity is good in the summer, but bad in the winter. which one, if either is correct? a. beryl, because low thermal conductivity results in low heat transfer. b. beryl, because low thermal conductivity results in high heat transfer. d. sapphire, because low thermal conductivity results in high heat transfer. e. neither, because low heat transfer is desirable both in summer and in winter.