Celluloid the first systetic plastic.
Because the navy and army help protect the country so without them america would be attacked
To see who is better, stronger, who will discover more, who will have more "territory" hope this helps
Intragroup.
An intragroup conflict is a conflict that takes place between one sector or group. The group being the United States, so their was a conflict inside the United States which makes it intragroup.
