Which human activity has the most negative effect on the stability of a river environment? A. People picnicking along the bank of the river B. Sailboats being stored in the river C. Driving a car near the river D. Boats leaking oil into the river

Boats  leaking oils to the river

Explanation:

Oil is very dangerous to the water environment. It causes pollution and is very difficult to clean

within 30 of the equator hope this

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

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