Answer:
Semantics.
Explanation:
IIn linguistics, semantic looks at the meaning of words in language including the symbolic use of these. It also refers to the multiple meanings a single word can have, according to context.
The reason why Krista understood the correct meaning of the word "arms", was because she was aware of the context. Semantics is a vital part of our written and spoken language and it is essential to understand the way others express.