Which process in respiration happens first?​

An unexpected celebration by having xavier call ava during ava's home birthday celebration, how does the author move the story forward? a. xavier's phone call gives ava an additional reason to hurry out. b. the phone call provides background information about the poison creeper movie. c. xavier's entrance into the story sheds light on ava's relationship with her parents. d. if not for xavier, ava would have been late for the movie. read this sentence from paragraph 5 of the passage. “we can go the back way around,” xavier said with practiced nonchalance, though he shot a nervous glance at his watch. which word has the most similar meaning to nonchalance in this sentence? a. coldness b. unconcern c. boldness d. tension