The rules that determine how sounds and words can be combined and used to communicate meaning within a language are collectively known as

Phonology.

Explanation:

Phonetics and phonology are two complementary branches of linguistics and their primary domain of study are sounds. Phonetics studies sounds as acoustic units, independent of their use and meaning.

The concern of phonology, on the other hand, are those same sounds as elements of a system that is a language. Phonology examines the way that sounds (phonemes) are used and combined in order to create meaning and transmit intelligible messages.

i'm sorry i don't understand the question.

the anwser is went creeping down the river again, across the wide lonely marshes to the sea.

i longed to go with them out into the world to seek my fortune in foreign lands—africa, india, china and peru!

and, dreaming of the lands i had never seen, i'd sit on there, watching till they were out of sight.