100 Point test please help Which environmental concern for ecosystems is directly related to the growing urban population of the world?

Climate change
Melting glaciers
Urban runoff
Rising sea levels

sorry if this is wrong bt j would say rising sea levels

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

where are the choice options?