Question

How do we know that the plants are alive?

Answer 1

Answer:

When plants are dead slowly their leaves becomes hard and start shrinking and changing colour from green to yellow and then black

I hope that it would be helpful

Answer 2

Answer:

they perform photosynthesis to prepare their food in the presence of sunlight and chlorophyll... they perform all the living process which a living being perform like nutrition, transportation, excretion, reproduction etc...