What does the word navigable mean based on the context clues provided?

What does tolstoy set up gerasim to be foil to praskoyva fedornovna

Diego rivera was a famous artist from mexico. most of his paintings were murals. murals are paintings that are made directly on a wall. rivera thought that all people should be able to see beautiful art, not just people who could afford to go to museums. this is why he painted most of his murals on the walls of public buildings

In writing, an idea map is a writing plan similar to: a)an outline. b)an illustration. c)a conclusion. d)a graphic.