Grid is a network of 1. parallels of latitude and meridian of longitude
2.the tropic of cancer and tropic of capricorn
3.the north pole and the south pole ​

1.

Explanation:

All parallel circles from the equator to the poles are known as parallels of latitudes. The lines of reference running from the North Pole to the South Pole are known as meridians of longitude.

answerpeople organize large projects such as levee-building;