Final answer:
The correct ioption is c. The term for the structures, rules, and techniques used to communicate in language is called grammar, which encompasses semantics and syntax for coherent communication.
Step-by-step explanation:
The structures, rules, and techniques used to communicate meaning in language are called grammar. This includes a variety of components such as semantics, which is the process of deriving meaning from morphemes and words, and syntax, the way in which words are organized to form sentences.
Understanding grammar is essential for forming coherent thoughts and sentences, which are used for everyday communication and is fundamental in the process of language development.