A lot of common garden plants are toxic to goats - I would recommend you borrow a book on toxic plants from your local library.
Yes
Roundup kills any plant. It does struggle with goat heads though, as the root needs to be destroyed with those nasty plants.
Goat lives on plants and grass so it is a herbivore.
motor oil, of any kind, would kill most plants
With its horns and hooves
Venomous snakes might kill a goat in self defense. Large constrictors, such as pythons and boas, may kill a goat as food.
no cause they only eat plants :)
NONE
Its a mammal
A milk goat is normally a dairy goat of which there are many breeds eg Saanen, Toggenburg, British Alpine, Anglo Nubians
goats eat all grasses but they prefer to browse, notr graze
Eating poisonous plants.