Plants do not have a digestive system because their need for nourishment is fulfilled through the process of photosynthesis and cellular respiration. They obtain their energy and and nutrients from the energy of the sun to create their supply to live.
The answer in the picture given
Certain plants close their stomata during the hottest part of the day so that the amount of loss of water by the process of transpiration is reduced. It help the plant to stop excessive transpiration.
This is 21st century .In this time our society as well as all of the world had become advanced and modern.So,in this time if we started to work without any technology then while working we need more manpower and our time will be loss.Science ,technology,engineering and maths play important role in modern world d .It helps in sustain able development and helps any country to be self dependent and makes profit by which Nations will be developed and it helps to win the future.