The instances of situational irony that occur in the above passage are:
The aunt expects the boy to accept her explanations, but he does not.
The aunt expects the boy to be interested in the cows, but he is not.
A situational irony is a form of irony in which the actions have an opposite effect of what it is intended. The outcome of the situation is totally different to what it is expected. In the above excerpt, the answers which the boy gets from his Aunt and the way he deals with those answers are an example of situational irony.
Enig-ma
The word enigma had its first known use in the mid 16th century, used as a noun to refer to a person, thing or situation considered obscure or concealed/unknown.
As is the case with more than 50% of English words, which have either Latin or Greek roots references, enigma has two root references. The word<em> aenigma</em> from the Latin language, means riddle and from the Greek word <em>ainigma</em> obtained from the word <em>ainissesthai</em> which means to speak in riddles derived from ainos - fable.
Prefix:
In this case there is no identifiable prefix.
Suffix:
A letter or group of words that when placed after the main word changes it meaning or gramatical function.
-ma is related to -ment (Middle English) concrete result of something... from the same Greek noun suffix - mat / -ma
The piece of information in passage 2 that is different from passage 1 is
A. Making compost requires prior knowledge and training.
While paragraph one describes composting as <em>an extremely easy process</em>
paragraph two tells us that creating the right compost requires <em>a trained hand and and an expert's guidance.</em>
<span>The answer is:</span>
Premise
A premise is a statement or
a proposition that offers support for a particular conclusion. The support or
the reason it gives will be enough to make the conclusion acceptable. A premise
is the basis of the inference that will lead to the conclusion.