What trophic levels do humans occupy on an ecologcal pyramid?

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity

What will happen to the amount of food available as a pondwater ecosystem ages

Do plants make food in their stems flowers roots or leaves?