Answer:
If all the plants on earth died, so would the people. ... When green plants make food, they give off oxygen. This is a gas that all animals must breathe in order to stay alive. Without plants, animals would have no oxygen to breathe and would die.
 
        
             
        
        
        
Answer:
The pressure of a gas increases in a closed container if the volume of the gas decreases. Pressure and volume have inverse relationship which means if one increases the other decreases and vice versa. If pressure increases, volume of a gas decreases because there are a lot of empty spaces present between gas particles which are filled when gas particles come closer to each other due to pressure applied.
 
        
             
        
        
        
The net force is the vector sum of all the forces that act upon an object. That is to say, the net force is the sum of all the forces,
        
             
        
        
        
Photosynthesis is The prosses of turning light energy into Chemical energy 
accrues in plants and some algae