Which of the following is an example of a sunscreen ingredient?

Amino benzoates are indeed a type of sunscreen ingredient. They function as chemical filters that absorb UV radiation, helping to protect the skin from sun damage. These compounds provide an important layer of defense against both UVA and UVB rays, which can lead to skin aging, burns, and even skin cancer.

In contrast, glycerin is primarily used as a moisturizer and humectant, helping to attract water to the skin rather than providing sun protection. Petrolatum serves as an occlusive agent, creating a barrier to prevent water loss but does not have any sun-blocking properties. Citric acid is an organic acid often used for its exfoliating properties and to adjust pH levels in formulations, but it does not offer protection against UV radiation either. Thus, amino benzoates stand out as the only option that offers specific protective benefits against the harmful effects of sun exposure.