We can see that the research question that is most effective is: D. What are fossil fuels?
<h3>What is research question?</h3>
Research question is actually known to be a question which is asked by a researcher which forms the basis for his evaluation, examination, and experimentation. Every good research question must be clear and focused.
We see that the selected answer is actually clear and focused and covers other aspect of the research.
Learn more about research on brainly.com/question/6947486
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Sad and stingy probably would not work in this situation, but sly and mean are possibilities. Although either could be correct, I would go with sly, which means they are sneaky and conniving. I’m not a 100% sure, but I believe sly is the best answer. I hope this helps!
"small boat"
how boat? => small boat.
the answer is "small".
"turbulend river"
how river? => turbulent river
the answer is "turbulent".
Good luck with :))
Answer:
2.5
Explanation:
The only value given is that of 'E', so 2.5 is the answer
