Answer:
D
Explanation:
I don't have time to explain but trust me lol
Answer:
"it was once part of the organisms from which the fossil fuels formed"
The Cambrian Explosion is when diverse animals were first recorded as fossils.
Phylum Porifera
The phylum Porifera ("pore-bearing") consists of approximately 5,000 species of sponges. These asymmetrical animals have sac-like bodies that lack tissues, and are usually interpreted as representing the cellular level of evolution
