I didn’t understand the question but Very often?
Answer: Yes; water vapor is one of the gases that the troposphere absorbs.
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William Harvey discovered the valve system of the heart
Answer:
D.
Explanation:
A. is wrong because the 'h' in Her is capitalized.
B. is wrong because of the coma after outfits.
This leaves us with C. and D. from this I would choose D. because it best resembles the colon sentence pattern (general idea: specific idea)
While both have to very different meanings, both have a definition of meaning something small (alley - small passage, pony - small horse, pour, or amount of money). Both are 6 letters, but when made plural, are spelling differently (alleys - just add s, ponies - drop the y, add ies). Both are Latin in origin, changing letter to French. But alley is late middle English, with pony being from the mid 17th century.
