In which sections or section of the kidney is the urine formed

The section of the kidney where urine forms is called the renal medulla.

Explanation:

Urine is formed as a result of the filtering of blood in the kidney. The "filtering" unit of the kidney is the nephron, and it is distributed in the renal medulla, the innermost portion of the kidney.

The medulla contains structures called the renal pyramids, which lead to a space called the renal pelvis, where urine collects before exiting through the ureters.

Learn more:

Renal filtration link

small, big, or no change could occur in the phenotype. it could cause something as simple as a cats ears to curl backwards or something as frighting as death. it could also occur in the protien-coding area and have an effect on that but no effect on the amino acids. what has to occur is a changing in the hox gene or the control gene.

they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.