Answer: A because before used to be fossils.
Not shure just double check but from my side its A
Explanation:
The answer is C are limited to life in a single year
The answer is B. Geology has shown a thin layer of iridium (a rare mineral on earth but found on asteroids and meteors) in the rock layers between the Cretaceous and Paleogene periods. Below this layer are numerous fossils of pterosaurs and dinosaurs, but above the layer are drastically few. The aftermath of asteroid impact is believed to have smothered most vegetation from earth which dinosaurs depended on as a source of food.
Answer:
nondominance I think
Explanation:
when something is not dominate.
can u mark me brainliest please