Final answer:
Jargon refers to the specialized language used within a particular field, which can be challenging for others outside to understand. It is the correct term for low-frequency words specific to an area of study, unlike homophones, idioms, or antonyms.
Step-by-step explanation:
Low-frequency words that pertain to a specific area of study would be considered jargon. Jargon refers to specialized language used by a particular profession or group that may be difficult for others outside that field to understand. It differs from other options like homophones, which are words sounding the same but differ in meaning and spelling; idioms, which are phrases with a figurative meaning different from the literal meaning; and antonyms, which are words with opposite meanings.
Understanding the usage of jargon is essential for clear and precise communication within a specific field. Reducing the use of jargon in writing helps to avoid confusion and makes your text more accessible to a broader audience. If you are not familiar with certain terms, it is advisable to look them up or replace them with words you know well to maintain accuracy in your writing.