Answer:yes,we need plants to survive.
Explanation: example like potato.where do we get it.Under soil.it's a plant.
(i)Like carrot.it's a plant
Why do we eat them
For survival
Thus we need plants also to survive
(ii) yes,we need animal also to survive as well as it has some function in our body
Example like fish.it's an animal and we eat it for growth
Like hen. We eat it to get strength and for growth.
But killing dog and eating is a crime now.Not all animals we must eat.
Thanks!