The troposphere is the lowest region of the atmosphere where there is a steady drop of temperature.
The Greek prefix "tropo" indicates a change or turning. This is relevant to the word troposphere as the the temperature changes in the troposphere.
Comes straight from the Latin neuter noun summārium “abridgment, abstract, epitome,” an extremely rare word used only once in the surviving Latin literature by the Roman author, tragedian, statesman, and Stoic philosopher Seneca (the Younger) in one of his Moral Letters to Lucilius (39)
I do not know what you are speaking about peculiar?
The answer is D Carol — An Inspiration
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