When a low mass star first runs short of hydrogen in its core, it becomes brighter because?

Where was an independent arab state created after world war i

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.

Which area on the map would be most likely to have the most oil exploration in since the start of the 21st century? a) b) c) d) plz me