People in developed countries tend to have a larger ecological footprint then people in developing countries

That they do. From things like vehicles, to factory production and output of smog, to more need for resources such as trees and coal and oil. They have more and want more which affects the ecosystem way more than countries still trying to find their footing.

there is no stairs in bungalow

explanation:

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they have identical fossils of organisms that have evolved over time.

both have animal fossils preserved in them due to weathering and erosion.

they contain different fossils because life on earth has changed through time.

the fossils in them were formed on the surface of earth due to exposure to sunlight.