Pleasee someone help me with this question..

How can rereading a passage to clarify the meaning of a later one?

Has anyone taken the voices of modernism (1920s to 1940s) unit test? ? i really need read the following sentence. the cars passing by are filled with commuters. identify the present participle in the sentence. a. by b. are c. passing d. filled

The primary purpose of telling how the colors change for jonas is…. explain.