But the grasshopper was cold, miserable, and hungry all winter. The commas (,) in the sentence above were used to separate
A. two sentences.
B. an introduction.
C. a series of adjectives
D. words spoken by someone.​

c. a series of adjectives

Explanation:

The use of "navigable" indicates a deep aquatic environment and wide enough to provide passage to the ships .

Explanation:

The term "navigable" was placed in these excerpts, with the aim of making reference to the quality of an aquatic environment to be navigable, that is, to be able to travel freely by boats or ships, without obstacles or insurmountable restrictions, and in a safe way.

The Amazon River, for example, is an example of navigable river.