C. to establish the intensity of the program
The answer is C. live in, as the paragraph states where they come. In the first sentence, the phrase "live in" is located, indicating that the main topic is the location of the birds.
The greatest difference in magnifying power is between transmission electron microscopes and dissecting microscopes.
It woild clearly be unusable. It would only be safe to trust websites with known professionals, sporting a healthy attitude. It's url would most likely need to be something other than a generic website. Instead of .com, look for something thats says .org or .gov.
I’m pretty sure the answer is d