Answer: contour lines.
Topographic maps are easily recognized by their contour lines.
1) Mass
2) I’m not exactly sure but I do know mass also determines the overall lifespan of a star
<span>Life expectancy in Sub-Saharan Africa is lower than that of more-developed nations.
Poverty is prevalent in Sub-Saharan Africa. </span>It is also<span> is the region with the highest prevalence (percentage of population) of </span>hunger<span>. When a person is malnourished as well as undernourished, he or she has lower immunity and is more prone to have diseases. </span>
