In addition to comets, water for earth's early oceans might have come from
a. rain.
b. rivers.
c. cyanobacteria.
d. volcanic eruptions.

Rivers of drainage system. option- 1 sao francisco 2 amazon 3 subarnarekha 4 uruguay

Based on what you know about the location of the earth in relation to the sun, why is this called the goldilocks zone in other galaxies? a. it's a region that exhibits a weak gravitational pull, thus maintaining a safe distance from the sun. b. it's an area that doesn't experience any major weather events that could cause mass extinctions. c. it's an area that's an optimal distance from the sun for potentially supporting life. d. it's a region that's unaffected by asteroid or meteor impacts.

What are the 28 countries in the eu?