You use them ro view things that are usually small
Answer:
because when we suitably level it there is high chance to have better seeds and production of plants. when there is good leveling then the plants get all nutrition and water equally with right amount of sunlight.
The Circulatory System delivers oxygen and nutrients in the blood to the surrounding cells to maintain Homeostasis. The blood in the Circulatory System is needed throughout the body so that other systems work properly. Like for instance the Nervous System has the brain, and the brain needs blood to function.
Answer:
The last one. I searched it on goggle