The correct answer is: Layer 1, layer 2, and layer 4 in all three regions.
The index fossils are fossils that are commonly used for identifying a geological period of time, and these fossils are also very wide spread, as well as having a rapid evolutionary trends.
By this picture, we can easily see that even though we have rock strata from different regions, the same layers contain the same fossil, and it is a fossil that also is rapidly evolving so has a minor change in each layer.
what are sound waves* but anyways sound waves are sounds that travel through waves.
example: music travels out of a device into our ear.
Answer:
it is one of three typesof cells, bacillus, coccus, and spirilium
Explanation:
bacillus looks like this
Coughing can be a symptom along with shortness of breath
