Question

all animal depend upon the plants for their food justify the statement

Answer 1

Yeah all animals depend upon plants for their food
some animals depends upon plants directly and some animals depends I directly
without food living things can't live

Answer 2

Animals are hetrotrophs, which cannot make their food by themselves. Hence, they are totally dependent on plant(autotrophs) for their food because plants can make their food by themselves by the process of photosynthesis.