Answer:
Coal, crude oil, and natural gas are all considered fossil fuels because they were formed from the fossilized, buried remains of plants and animals that lived millions of years ago. Because of their origins, fossil fuels have a high carbon content.
Explanation:
Answer:
the answer is d (all of the above)
Explanation:
no
The correct answer is option C
The main cause of extinction on earth today is the impact of human beings on environment. Previously, extinction caused due many reasons but now the main reason is the involvement of human beings in the environment.
The human activities like deforestation, construction and many more activities adversely effects the population of most of the species.
They first become endangered and then readily if not protected on time becomes extincted.
Answer:
The smaller object will move at 30 m/s
Explanation:
From the principle of conservation of linear momentum,
Momentum of objects before collision = momentum of objects after collision.
where 
are the masses and velocities of the objects 1 and 2 respectively before collision.
Hence, the object will move at 30 m/s
Answer:
A: Producers produce nutrients, some consumers eat producers
