Which characteristic of tsunamis is true? They are measured by how far they travel.

They cause the ocean to briefly drain away from the shore.

They can travel as fast as 500 miles per day.

They occur a day or two after an earthquake.

It is the doctrine that the us had the right and duty to expand throughout north america. it just means they believed they had the right to expand westward and they did! they stated with the 13 colonies and then they kept moving gaining different territories throughout the years

Answer accretion;