Steam Boat
Riding Plow
Telegram
Milling Machine
Answer:
The United States faced many problems following World War I, including in the areas of race relations, labor, and political radicalism.
The right answer for the question that is being asked and shown above is that: "Sea reptiles become extinct > Mammals appear > Birds appear." The list below describes some events which took place at different periods in the geologic time scale. This is the <span>order of the events from the earliest to the most recent</span>