Earth can be considered as a closed system, since it only receives sunlight (energy), while the overall mass stays constant, without (almost) any exchange from space. Another example of a closed system is a saucepan or frying pan, on a stove, when its lid is closed.
Answer:
She freed hundreds of slaves through the Underground Railroad
Explanation:
During the Civil War she was also Union Spy and help lead to the Emancipation Proclamation.
I give one, for example: when I was travelling on Malta, I found a lot of Roman remains: catacombs, mosaics, a remain of a Roman house.
Malta is an island so they must have used sea travel to get there.
Answer:
Correctional is the correct answer.
Explanation: