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

the proximity of water was an advantage to western europe and its culture was able to flourish as a result. trade and travel by sea were easier and safer in historical times.

1. there are no mountains to protect it from the sea

2. and its has wet cool summers and wet, mild winters.