Sea otters are a keystone species, meaning their role in their environment has a greater effect than other species. ... By maintaining healthy kelp forests, sea otters also indirectly help to reduce levels of atmospheric carbon dioxide, a prevalent greenhouse gas, as kelp absorbs and sequesters carbon
Saturated zone
The correct answer is saturated zone. This area contains permeable rocks and soil here is totally filled with water or we can say is saturated with the water. This zone is called as saturated zone.
An experiment is a procedure that tests a hypothesis by the process of collecting information under controlled conditions.
<h3>What is a controlled scientific test of hypothesis ?</h3>
A controlled experiment is a scientific test done under controlled conditions, meaning that just one (or a few) factors are changed at a time, while all others are kept constant.
- Controlled experiment. an experiment that compares the effect of one manipulated variable to a group that receives no treatment. controlled variables. factors that should be kept the same in both the treatment group and the non-treated group.
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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
