Answer:
Fossil Z is younger than Fossil Y.
Explanation:
For any age-related questions in geology, we have to consider the basic principle of stratigraphy. According to which, sediment layers on top harbor younger fossils whereas <u>layers</u> on the <u>bottom</u> have <u>older fossils</u>. In the case given here, Fossil Z is younger because it is in the top layer and Fossil Y is in the middle layer. The other two options are completely wrong because Fossil Y cannot be older than Fossi X and likewise, Fossil Z doesn't exist in multiple periods rather it is present only once.
Answer:
the fish experienced an evolutionary change because of genetic drift
Explanation:
The outermost layer of the Earth is called the crust.
Resistor
An electrical component that limits or regulates the flow of electrical current in an electronic circuit
Hope this helps!