15 pts
Why are many of Earth's cities built on ocean coasts?

Tell students that many of the world's largest cities are located on the coast. Throughout history, cities were built around ports because ports provided opportunities for trade, jobs, and transportation. People chose to move to coastal cities for these reasons.

Explanation:

trading and transportation

layers of the earth affect the waves and these effects are seen on instruiments such as seimometers

find the sum of the two horizontal vectors and the sum of the two vertical vectors

isoceles right angled triangle