Question

Heya armies how are you all (especially @Shreyaot7g)? Hope you all are pretty fine.
So today's question-

What is an allergen? Name three common allergen.
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Answer 1

Answer:

Airborne triggers are commonly dust mites, pollen, mould spores, and cat and dog allergens. Skin contact or inhalation of an airborne allergen can lead to symptoms of skin rash, swelling of the eyes, hay fever and asthma. Airborne allergens are not often a trigger for anaphylaxis.

Answer 2

Answer:

By using lubricants: friction increases as the roughness of the surface increases. Lubricants fill the fine pores and gaps between contact surfaces and reduces friction

Explanation:

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