**Core Concept**
The question is testing the concept of antimicrobial resistance and the mechanisms used to remove bacteria. The correct answer involves the use of an enzyme that breaks down bacterial cell walls, leading to their death.

**Why the Correct Answer is Right**
The correct answer involves the enzyme lysozyme, which is present in human saliva and tears. Lysozyme acts by breaking down the bacterial cell wall, specifically the peptidoglycan layer, leading to the death of the bacteria. This is an example of enzymatic lysis, which is a mechanism used to remove bacteria from the body.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not involve the use of an enzyme to break down bacterial cell walls.
**Option B:** This option is incorrect because it does not involve the use of an enzyme to remove bacteria, but rather a physical mechanism.
**Option C:** This option is incorrect because it involves the use of a different mechanism to remove bacteria, one that is not related to enzymatic lysis.

**Clinical Pearl / High-Yield Fact**
Lysozyme is an important enzyme that helps to protect the body from bacterial infections, particularly those caused by Gram-positive bacteria. It is also an important mechanism of action for some antibiotics.

**Correct Answer:** D. Lysozyme is the correct answer.