Answer:
<u><em>Water Pollution</em></u>
Explanation:
<u><em>Dumping trash in the ocean and the smoke from factories goes in the water which makes the ocean more acidic and having less oxygen. </em></u>
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<em>~Hope this Helps~</em>
I think the answer is photosystem
A trilobite. Trilobites became extinct about 250 million years ago while a ammonite became extinct around the same time as dinosaurs(65 million years ago). You wouldn't find a human skull or a dinosaur footprint
