In "the lagoon" by joseph conrad, what motivates arsat to leave his brother behind? he knows his brother will survive. he was angry with his brother. he doesn't realize the extent of the danger. he is afraid his pursuers will catch them.

Arsat left his brother behind because he was afraid his pursuers would catch them. As he pushed his boat away from the shoreline he saw his brother running towards him being pursued by their enemies. His brother tripped and fell and the enemy was up him, he called out to his brother but Arasat left and sacrificed his brother in order to save the woman he loved.