Paul wrote:
A is the correct answer. This question is about the use of present vs pastparticiple.
present participle is used to denote a present condition that stillprevails
past participle is used to denote a completed action, usually in a passive mood
The sentence is definitely talking about the filigree:
filigree[of mushrooms and rootlike tentacles] spawned by a single fertilized spore some 10,000 years ago andextending for more than 30 acres in the soil of a Michigan forest
What is b/w brackets is a prepositional
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