Read the excerpt from Into the Unknown by Stewart Ross, and then look at the map below. How does the map help the reader understand the information in the excerpt? Her plan was to travel as far as she could up the great brown Ogooué River, which winds almost 700 miles into the heart of Gabon. It explains how far steamers could travel upriver. It shows the Move's journey across the equator. It gives visual details of the forests and river banks. It shows the location and the size of the Ogooué River. The Mové steamed south along the coast, crossed the equator in the afternoon, and reached the broad mouth of the Ogooué by evening. Chugging steadily upriver, over the next two days the steamer carried Kingsley between banks of overhanging forest to the small settlement of Lambaréné, 130 miles from the sea. 1.it explains how far steamera could travel upriver 2. it shows the movies journey across the equator 3. Akins visual detail on the forest and river banks. 4. it shows the location and size of the ogooué river ​