Identify rather the underlined clause is an adjective clause adverb clause or noun clause after they had traveled for several years the people settle near the freshwater source.

Respuesta :

after they had traveled for several years - adverb clause

Explanation:

The clause "after they had traveled for several years" is introduced by after, which is a subordinating conjunction of time.

The clause "after they had traveled for several years" is  an adverb clause of time.