Ti increase productivity
To main water level under the soil for future use
The stored water works when area will dry
Fertility will increase
ET
C
Hopr for brainliest mark
Ventilation systems are needed in a <span>multicellular organism to actually obtain oxygen and give out carbon dioxide. Without this ventilation system, it would be very difficult for multicellular organisms to survive. It has been also observed that surface diffusion is not enough for a multicellular organism to breath.</span>
Explanation:
the amount of waste in the ponds affect the area beside their and It affect the whole ecosystem,the people who are living their and also affect the livelihood of the people..
1. Release of chemicals by cells
