Various factors of pathological and chemical nature may progressively destroy the nephron, particularly its:

Explanation

The correct answer is the glomerulus because it is the primary site of filtration within the nephron, making it particularly vulnerable to damage from pathological and chemical factors. These factors can impair the glomerulus's ability to filter blood effectively, leading to progressive destruction. In contrast, the convoluted tubules and loop of Henle are more involved in reabsorption and concentration of urine, respectively, and while they can be affected, they are not the primary sites of initial damage. The Bowman's capsule surrounds the glomerulus and can also be impacted, but the glomerulus itself is more directly involved in the filtration process and therefore is more susceptible to progressive damage.