B. The best classification for fossilized burrows dug by ancient clams is Trace Fossils.
A trace fossil, is a type of fossil record of biological activity but not the preserved remains of the plant or animal itself.
Some of trace fossils include the following;
Thus, the best classification for fossilized burrows dug by ancient clams is Trace Fossils.
Learn more about Trace Fossils here: https://brainly.com/question/17131999
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