Answer: it would be b. a biologist studying insects.
Domain, Kingdom, Phylum, Class, Order, Family, Genus & Species
Sunscreen works by blocking and absorbing UV rays through a combination of physical and chemical particles. Physical particles, such as zinc oxide and titanium dioxide, are used to reflect UV radiation from the skin.
Answer:

Explanation:
B-cells engulf an antigen by endocytosis.
<u>Endocytosis:</u>
The process by which cell takes up external materials by fusing them with plasma membrane is called endocytosis.
After engulfing the antigen, B-cells become sensitive to the pathogen.
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Hope this helped!
<h3>~AH1807</h3>