Why aren't plants the first form of life to appear on earth

enviornment of primitive earth was suitable for less complicated organisms(bacteria,virus)  as they only require sun light and carbon di oxide to produce food and also they were able to survive that harsh environment which was not suitable for plants

from the original order (top to bottom) the new order will go

1 (founder)

4 (hawk)

2 (mutate)

3 (next generation)

rain is the best answer