Firstly, we need to know what a healthy ecosystem is. When an ecosystem is healthy, this would mean that it could supply all the resources that all organisms present in it and with all the resources, there is diversity. Old growth forests are considered healthy because of this reason. These forests remain untouched and had remained in providing the resources needed for the organisms present in it.
A. is the answer because they are found in the earths crust because overtime dirt and water covered the fossils
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Answer:
Stomata takes in water,sunlight,and dioxide and release oxygen.
