I believe the answer is c.
Answer:
PRACTICAL PROBLEMS
Explanation:
In simple words, A realistic research issue relates to the particular question, obstacle, inconsistency or knowledge discrepancy that you should try to tackle in your study. You may be searching for realistic problems that aim to lead to progress, or speculative problems that aim to extend knowledge. Thus, from the above we can conclude that the correct option is B.
The way the earth tilts towards the sun determines the climate and season.
Example if the world stopped moving we would be stuck in one season forever
I believe the answer is Birds of North America
Birds of North America basically a comprehensive encycplopedia consisted of various types of birds that live in the region of Canada and United states.
This books contains the combination of works from more than 800 authors and regarded as the Best <span>ornithological works ever completed.</span>