Which statement best expresses the author’s central idea in the text?

Select two details from the text that best support the inference that technological advancements will be key to solving challenges on Mars.

Part A: Which of these inferences about the cost of going to Mars is supported by the text?

Part B: Click on the paragraph from the text that best supports your answer in Part A. Choose one answer.

Read the dictionary entry. adjective - "the most unpleasant". Which word from the text best matches the dictionary entry?

Read the paragraph.

What conclusion can be drawn about what scientists are doing to make the dream of living on Mars a reality? Support your answer with details from the text.