What is the primary function of air purifiers in indoor environments?

Air purifiers are specifically designed to improve indoor air quality by targeting and removing various pollutants and allergens present in the air. These devices typically utilize filters or other technologies to capture particles such as dust, pollen, pet dander, smoke, and even microscopic organisms like mold and bacteria. This function is crucial for creating a healthier indoor environment, especially for individuals with allergies, asthma, or other respiratory issues, as it helps reduce exposure to harmful airborne contaminants.

The other options focus on different aspects of indoor environment management. While regulating temperature and humidity is essential for comfort and can impact air quality indirectly, it is not the primary role of air purifiers. Similarly, reducing noise pollution is a concern within indoor environments but is unrelated to the purifying function of these devices. Lastly, enhancing aesthetic appeal may be a secondary consideration for some users, but it does not pertain to the fundamental purpose of an air purifier. Ultimately, the primary function of air purifiers is to remove pollutants and allergens from the air, making option B the most accurate choice.