What condition is defined as inflammation in the body?

The correct choice identifies inflammation in the body specifically as dermatitis. Dermatitis is characterized by the inflammation of the skin, which can result from various causes, including allergies, irritants, or underlying health conditions. Symptoms may include redness, swelling, itching, and sometimes cracking or peeling of the skin, all of which signify inflammation.

Understanding inflammation is crucial because it is a fundamental response of the immune system to harmful stimuli, and it can manifest in various forms throughout the body, including the skin. Recognizing dermatitis as a condition associated with inflammation helps differentiate it from other skin conditions that may not necessarily involve this response.

The other options provided represent different conditions but do not specifically define inflammation as the primary characteristic. Adema refers to swelling caused by excess fluid in the body's tissues, acne is a skin condition associated with clogged pores, and psoriasis is an autoimmune condition that results in rapid skin cell production and scaling, but none of these terms solely encapsulate the concept of inflammation in the same way dermatitis does.