Yes, it will kill the leaves but the roots will survive over the winter (in the UK).
It is possible that bind weed or other plants could kill hostas. Black walnut trees also will kill hosta or other plants that try to grow near them.
Opossums prefer road kill or insects. It is more likely that it is a vole eating your hosta.
Yes, anti-freeze can kill you if you drink it.
Yes, a brain freeze could actually kill you.
Yes, a freeze can potentially kill grass seed if it is not able to germinate before the freeze occurs.
If you consume it.
You kill him with kryptonite- many have tried it and all have failed.
what type of herbicide?
Yes, plants can kill plants in one day.
Sure why not
There is certain types of grass that kill plants, but normal yard grass will not, it also depends on the plants. But usually its the weeds that kill the plants, not the grass.
No, it does not kill plants, it might be of some benefit to them.