Fact 1: Nephrons are the structural and functional units of the kidneys.

Fact 2: Damage to the nephrons can be caused by conditions such as diabetes and high blood pressure .

Given the two facts above, answer the question "Damage to the structural units of the kidneys can be caused by  .." with the following options: 
- harmful substances
 - an area swollen with pus
 - a lot of human deaths
 - Pesticides
 - Heavy rains
 - Leptospirosis
 - Veins and arteries.
 - high blood pressure


 

        high blood pressure 