Assume that you are the instructor of this class and you were required to deliver a lecture on the concept of ray tracing that included the following topics:
ray tracing versus ray casting
primary and secondary rays
lighting, reflection, and refraction

You wanted to look up information about alzheimer's, but you were unsure if it was spelled "alsheimer's" or "alzheimer's." which advanced search strategy would be useful? a) a boolean search b) using a wild card in your search c) trying different search engines d) doing a search for "alsheimer's not alzheimer's" asap. ill give brainlist.

Facial expressions and gestures are examples of messages.

Alcohol’s affects on the cornea and lens of the eye make it more difficult