Is oil manmade ? Is it renewable or nonrenewable

No, oil is not man made. It is an organic compound which is formed when the dead bodies of plants and animals are buried into the soil and exposed to high temperatures and pressure. Petrol is formed from the dead bodies of animals while coal is formed from the dead bodies of plants buried in the soil. Oil is non renewable resources because it cannot be recycled and reused.

they each offer a fresh glut of resources to the organisms that can arrive and exploit them. as individuals and new species continue to appear, they actively and passively alter the environment. competition for shared resources increases, local abiotic and biotic conditions shift, and the relative abundances of species change accordingly. the process is called ecological succession, and it is one of the earliest and most well-known concepts in ecology.