Frog control is almost entirely making the area less conducive. Eliminating food source (insects) a well manicured lawn (harborage reduction) and most importantly-moisture reduction-they must have a place to soak, if this can be removed, you are almost assured success. if it can't, example a pool, it is tough but there is also a very effective inexpensive solution called frog netting for your fenceline. If you have wood Fencing you can install with a stapler and scissors. this will keep them from encroaching onto your property
Yes, cats are known to hunt and kill frogs.
no, not tree frogs, but some other frogs can be like that
No, snails don't kill frogs they actual help frogs by eating harmful bacteria.
Yes, chlorine can be harmful to frogs and can potentially kill them if they are exposed to high levels of it in their environment.
Most substances foreign to frogs are harmful or lethal.
It is either one of many species of chorus frogs or spring peepers. I can't tell you specifically without more of a description.
Wild animals
sometimes
There skin will kill you
Chemical composition of the pesticide.
they kill themselves by drowning them
you can not kill rocks there not alive