Please explain the OG 12 question by answering the following questions IN DETAIL ...Please please specify the details of the questions asked and do not just post random answers

i am confused between the usage of participle v/s verbs v.s adjectives...

Can someone answer the following questions:

1) Can someone please explain how to know we need a participle or adjective or verb ?


2) Also, what is the main verb in the modifier sentence : "a giant fungus that is an interwoven filigree of mushrooms and rootlike tentacles spawned by a single fertilized spore some 10,300 years ago and extending for more than 33 acres in the soil of a Michigan forest. "? Is this whole bolded part one modifier???



3)Is the bolded part itself a modifier and it has a modifier within it too ?



4) How do we know in this sentence=> giant fungus that.... forest that if we start with THAT until what part is the modifier there and we need to hide the modifier and re-read the sentence?


5)Can actions alone can be verbs too? ex. In the library and at church, Michele giggles inappropriately.

In the above sentence 'giggles' is a verb..














Scientists have recently discovered what could be the largest and oldest living organism on Earth, a giant
fungus that is an interwoven filigree of mushrooms and rootlike tentacles spawned by a single fertilized
spore some 10,000 years ago and extending for more than 30 acres in the soil of a Michigan forest.
(A) extending
(B) extends
(C) extended
(D) it extended
(E) is extending