Can you rephrase the question? :)
Answer:
A farmer would chose a luxury crop over a high caloric or nutritionally valued crop because a luxury crop would generate them more profit.
These are non-subsistence crops, ones that are not necessary to survive and be healthy, but luxury goods like the name implies. People are willing to pay more for them for this reason.
Answer:
How many hours you need to spend on studying for AP tests every week is going to depend a lot on how much material you need to review and how comfortable you are with the format of the exam questions. In general, though, you should expect to study for several hours a week split over two to three sessions.
Explanation:
The body is divided into several different systems. Do you need examples of the systems?
By 18 weeks an ultrasound technician will most likely be able to identify the sex of the baby
