I think it’s A
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The answer is D. A, B, and C all use photosynthesis, and make their own energy. A cougar relies on killing other animals to get energy. I hope this helps!
Answer:
Explanation:
The high clouds are cirrus,
The middle clouds are cumulus,
And the low clouds is stratus.
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The hydrocarbon which would most likely be an alkyne is COMPOUND W WHICH HAS A BOILING POINT OF -23.
This is because, among hydrocarbons, alkynes have the highest boiling points as a result of the triple bonds in their structures.
The boiling points of the other compounds are -103.7, -47 and -75; all these boiling points are lower than that of compound W.
Answer: 6,000/30 = 200, so 200 molecules are required.
Explanation: