Answer:
The correct answer is option (D) there was a time in Pennsylvania history when dinosaur existed.
Explanation: A paleontologist discovers a rock slab on which the footprints of a Pennsylvania dinosaur are well preserved. This means that there was a time in Pennsylvania history when dinosaur existed in this area. Here fossil is a fragment of rock on which the footprints of dinosaur is present.
Can you show an image of the question?
The appropriate answer is a. Increased rainfall across the eastern Pacific Ocean. Scientists are still not sure what causes El Nino events but it does disrupt weather patterns all across the globe. One of the effects include increased rainfall along the eastern Pacific in countries such as Peru and Chile. These regions do not normally receive heavy rainfall.
<span>Cardiac muscle must function without the need for Oxygen control.</span>
