This is in science about plate tectonics plz help: Some regions of the Earth are more likely to have earthquakes, volcanoes, or hot springs than other regions. What do these places most likely have in common? A.
They are regions with big cities.
B.
They are regions where tectonic plates meet.
C.
They are regions in the northern hemisphere.
D.
They are desert regions.

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.