Answer: Brazil has a long coastline of about 7400 km along the Atlantic Ocean.
- The coastal region extends from the state of Amapa in the north to Rio Grande do Sul (the Uruguay border) in the south.
- It can be divided into two parts: the northern coast (from Amapa to about Rio Grande do Norte) and the eastern coast (from there to the south).
- The northern coast is low-lying; the Amazon enters the Atlantic here and forms a large estuary with many islands, of which Marajo is the largest.
- Along the eastern coast the Great Escarpment lies close to the sea, so the coastal plain is narrow. The Sao Francisco river reaches the Atlantic on this coast.
- The coast has many bays and natural harbours, such as the Bay of All Saints (Salvador) and Guanabara Bay (Rio de Janeiro); lagoons such as Lagoa dos Patos are found in the south.
- Ports and cities such as Rio de Janeiro, Santos, Salvador and Recife lie on the coast, and the coastal region is densely populated.