dodging and burning are darkroom processes by which the photographer can manipulate which aspect of a photo?

There are traits like blood type and eye color, and others like speaking english or having a scar. what are the terms used to describe these different types of traits? how are each defined?

The chart shows four articles read by the students in a science class

Lyle is concerned about the difference between a company's salaries for its white workers and its colombian workers. in order to place economic pressure on the company, what does lyle need to do?