All of the following are steps in the formation of a fossil except:
A) complete consumption of a dead organism by decomposers.
B) gradual decay and dissolution of parts of a buried organism.
C) slow filling of a cast of a buried organism by minerals.
D) rapid burial of a dead organism by sediments.

A.

Explanation:

All that really needs to be done is the process of elimination. We know it's not A. because decomposers are bacteria, fungi, insects, etc. If an organism is completely consumed by decomposers, there would be nothing left to even be in the formation of a fossil.

As for B, C and D, they all explain the process of the formation of a fossil.

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explanation:

plate tectonics and volcanic euptions

over time, plate tectonic processes cause continents to move to different positions on the globe.

for example, britain was near to the equator 300 million years ago, and therefore was hotter than it is today. for further details look at our climate through time poster or online map.

the movement of the plates also causes volcanoes and mountains to form and these too can contribute to a change in climate.

mountain ranges formed by plate tectonics. large mountain chains can influence the circulation of air around the globe, and consequently influence the climate.   warm air might be deflected somewhere cooler by the mountains.

bacterium is not correct