Please helppp, It would be appreciated :)

The answer is gross domestic product. hope this

Considering only personal water use, people in the developed world use about  germany was the only country in world war 1 to use u-boats  than people in the developing world

Conditions are more like living on  land  for creatures in the upper part of the intertidal, which is only covered with  water  at extreme high tide, so life is easier on land. conditions are more like living in the ocean for creatures in the lower part of the intertidal which is only exposed to air at extreme low tide. so basically it both worlds of land and ocean.