Ascientist attends an annual conference hosted by the american cancer society. at which type of event is she most likely to see informal presentations of many different attempts to treat and prevent skin cancer?
a. lecture
b. panel discussion
c. poster session
d. keynote address

The correct answer would be B. poster session.

A poster presentation is an event of a conference in which research information is presented in the form of paper posters to be viewed by participants of the conference.

In a single event, numerous posters are presented through which various researchers illustrate their research methodology along with their results.

Thus, informal presentations of many different attempts to treat and prevent skin cancer are most likely to be observed in a poster session of the conference.

the dark variety, as they are not visible on the dark tree barks

explanation:

c. heat from the poles back down towards the equator.