Planktons primary importance to ocean ecosystems is primary production. This is<span> exhibited with phytoplankton that is photosynthetic and provides energy for </span><span>higher trophic level organisms such as nekton and bethos. They are essentially</span><span> the plants of the marine ecosystem.
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The other elements<span> in the </span>SPONCH<span> CaFe are calcium (Ca) and iron (Fe). Calcium is an </span>important<span> structural component. Bones and teeth contain calcium. ... Iron is</span>important<span> in the synthesis of hemoglobin, which is responsible for carrying oxygen in blood.</span>
I would go with A : weathering and erosion
I was going to say C : volcanoes and earthquakes but when you read the pictures it says “ Mountains , low hills & rolling plains “
I will answer this if I find the answer.
Answer: I have it attached
Explanation: