What is the name for the english term to clear up or to make information more understandable: to explain

Read this excerpt from leah missbach day's foreword to wheels of change. as wbr's resident photographer i am privileged to see firsthand the impact bicycles have on the lives of our recipients. why does the author include this excerpt?

Where does the receiver live in the giver?

Which is a run-on sentence? a) all of the fish that we caught were too small to keep. b) ricky changed the oil, he forgot to replace the oil filter. c) the striking patriotic design surprised the memorial planning committee. d) everyone on the harbor cruise reported feeling a little seasick and left early.