Answer: allergies.
- A bacterial infection
- B allergies
- C high fever
- D acidity
Correct answer: B. allergies
Explanation: Antihistamines counteract the effects of histamine, easing allergic reactions such as hay fever.
The hydrophobic hydrocarbon tail of each soap/detergent molecule dissolves into an oily dirt droplet, while the hydrophilic (ionic) head stays in the surrounding water - trapping the grease inside a micelle that rinses away with water.
Concept context
Drugs and how they interact with biological targets, chemicals in food, and cleansing agents (soaps and detergents) - chemistry applied directly to daily life and healthcare.