If all the animals died off you could possibly just eat plants, except that at least some plants are dependent upon animals to reproduce (some seeds won't germinate unless they pass through the gut of an animal, and others need to be pollinated by animals). And anyway, if ALL the animals died, you'd be dead too, because human beings are animals.
They would DIE!
Other animals will die and eventually we will to.
All animals depend on each other to live so all animals would die out including humans.
First, all of the plants and trees would die. Then all the animals, including humans; would die.
we would die, too
They'd all die
we all die lol Everything that needs oxygen would die. including us, animals, and plants.
they would die!
All of the animals would die. Cuz the animal that ate the plankton would die then the next species would die.
All of them would die, they would not be able to find food from anywhere else, after the herbivores die it would start to affect the carnivors. They'd be able to eat the remains of the dead animals but when they have all been eaten then the carnivors would start to die until no animals were left. Even sea animals would die due to the heat from the sun being more higher as CO2 levels rise, all the water would evaporate and the sea animals would die of suffocation.
They would become fresh water bodies and all the animals in them would die.
we would have no food and die