HELP ASAP PLEASE. Which of the following statements is the best example of an interaction between the atmosphere and the hydrosphere? A. Intense heat from a fire may cause rocks to break apart.

B. Lack of moisture in the air causes pond water to evaporate.

C. Lightning strikes from the air may start a fire by burning dry vegetation.

D. Increased erosion of soil may lead to increased sediments in the water.

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.