To develop the first 365-day calendar. Ancient Egyptians used the
A. shadow made by the Sun
B. movement of the stars
C. phases of the Moon
D. movement of the planets
Please select the best answer from the choices provided

Which of the following best describes the purpose of a nation’s boundaries? a. to limit the movement of goods and people b. to make it easier for cartographers to create maps c. to make the movement of goods and people easier d. to prevent other countries from invading territory