As people, we depend on percent of the freshwater supply of the world

I think there should be an options to choose. But I can provide you with official charts about the percentage of the freshwater supply of the world and you will choose the closest number from your options.
68% is in icecaps and glaciers;
30% is found in ground water; 
0.3% is found in lakes, rivers and swamps.

The correct answer would be they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.

Ais your right answer