Which text feature would best support the details in the
excerpt?
Read the excerpt from Into the Unknown by Stewart Ross.
It was soon clear that the Ma Robert had serious design
faults. Her engine was not powerful enough to drive her
upstream against strong currents, and her boiler
consumed vast quantities of wood: a day's steaming
needed one and a half day's wood-cutting. Her hull was
made of thin sheets of a new kind of steel that had not
been tested. It soon developed so many holes that it
leaked like a colander and had to be continually pumped
out. "For us, steam was no labor-saving power,"
Livingstone grumbled in his journal. He called the Ma
Robert all sorts of names: "the wretched little steamer," the
"tin kettle," and "the slow puffing Asthmatic."
O a photograph of Charles Livingstone
O an illustration of Ma Robert
O a map of the African continent
O a chart of the many uses of steam