Channel proteins is the answer to your question
<span>The ecosystem is the lowest level of the biosphere hierarchy to include weather patterns and soil conditions.
in the whole biosphere hierarchy, ecosystem actually placed as the second highest (1 place below biosphere)
But there are only 2 hierarchy that include weather and soils, and those hierarchies are biosphere and ecosystem. So technically the ecosystem will be the lowest in this matter</span>
Answer:
That would be option D. A motor.
Explanation:
The brain which, along with the spinal cord gathers informationand responds to changes in the environment.
