What are the space enemies or environmental hazards in the astronauts inspace surviving the extremes?

the lack of oxygen a crack in their helmet could result in immediate death limited tools and limited amount of astronauts would result in death aswell they only get one chance to fix something and one ship if one thing fails everything fails

even though you have attached neither the chart nor the generalizations, i have located them online. the right answer is d, since they are asking you about a generalization. you can only infer from the chart that between 2008 and 2009 the number of employed workers decreased significantly (from over 115 millions to 107 millions approximately), which signals some type of economic crisis.