Answer:
A. Phone repair requires detailed knowledge of how phones work.
Explanation:
Technical terms refer to words related to a particular subject or science. In that matter, a phone repairman's manual constains specific vocabulary concerning the components of a phone, inside and outside, as well as how those parts function in combination to make a phone work.
The rest of the alternatives are incorrect because they do not involve the fact that a phone manual has more technical terms than a television guide.
It is verbal because "relating to or in the form of words"
Main ideas are often found at the begging of paragraphs. The first sentence often explains the subject being discussed in the passage. Main ideas are also found in the concluding sentences of paragraphs
