An adverb can refer to objects of time. They are usually prepositions also.
1. Often
2. Very Fast
I: noun
run: verb
fast: adjective
D, determine weather you've understood the material
Lets define 'direct object'; "The object that directly receives the action of the verb.
In this case, the direct object is worms.
Answer:
the main idea of the paragraph is the effects inertia has