Which type of response identifies a specific pathogen in the body?

I believe the answer is an immune response.

A pathogen is a disease causing substance or organism, such as infectious bacteria, viruses, and fungi; sometimes referred to as "germs". Immune system consist of disease fighting white blood cells and external barrier such as skin, proving protection against an enormous variety of pathogens, such as bacteria, fungi, some viruses, parasitic protists, and worms.

There are two divisions of immune system rwhich are specific and non-specific. For non-specific immune response, it recognizes and destroys pathogens as soon as it encroaches the external barriers and it responds to all pathogens in the same way. Lastly, it responds to infection within minutes.

For the specific immune response, the pathogens that are not being killed by the non-specific defenses are being destroyed. It also recognizes pathogens and forms a memory of each. However, unlike the non-specific immune system, it responds to infection in hours to several days.

Therefore the answer is specific immune response.