Answer:
Words like pursuit, discovery, magnetic shield, modifications, Gauss can help identify the specialized audience.
Step-by-step explanation:
Semantics is the linguistic study of meaning in language; it tries to discuss and identify the relation between signifiers (words, phrases, signs, symbols, the order of words and/or ideas) and their denotation, what they really stand for. It is very helpful to decide a target audience. In the passage, the words indicated in the answer belong to a specialized audience related to science; the words are not very common and they are used in very particular fields of study.