When tissues are subjected to chemical or physical trauma or invasion by pathogenic microorganisms, what can occur?

Inflammation

Explanation:

Inflammation is an immune response produced in the body in response to the damage or trauma caused by physical or chemical factors.

The injured tissue can allow the entry of the microorganism in the body which could cause disease therefore the immune response gets activated to eliminate the pathogen.

The inflammation is marked by the swelling and redness in the injured portion due to the increased flow of blood carrying the White blood cells in that area. The immune cells interact with the pathogen and kill the pathogen.

Thus, Inflammation is the correct answer.