How long does it take for most fossils to form

10,000 years

Explanation:

Fossils are defined as the remains or traces of organisms that died more than 10,000 years ago, therefore, by definition the minimum time it takes to make a fossil is 10,000 years. But, that is just an arbitrary line in the sand – it means very little in terms of the fossilisation process.

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.