Question

1. which visual aid would make the most sense to include in a quick start guide for a teeth - whitening toothpaste?

a chart of the chemicals and active ingredients in the toothpaste
an illustration of toothpaste being squeezed onto a toothbrush
a diagram showing the correct amount of mouthwash to use
a picture of an approving dentist

Explanation:

A Quick Start Guide focuses on simple, immediate usage instructions. This visual directly demonstrates the basic first step of using the toothpaste, which aligns with the guide's purpose. The other options are either too technical (chemical chart), irrelevant (mouthwash diagram), or a credibility boost rather than a usage aid (dentist photo).

Answer:

an illustration of toothpaste being squeezed onto a toothbrush