It soaks into the soil to move into the groundwater or runs off the Earth's surface in streams, rivers and lakes, which drain back into the oceans. The water may be taken up by plants and returned to the atmosphere through processes like transpiration and photosynthesis.
You can determine that the deer population was reduced by 1, due to the losses being more than the gains. It can also be expressed as a math problem 6 - 5 - 3 + 1= -1