So sound travels 1 kilometer in roughly 3 seconds and 1 mile in roughly 5 seconds. When you see the flash of a lightning bolt, you can start counting seconds and then divide to see how far away the lightning struck.
The right option is d. subject
The noun phrase green, leafy vegetables in this sentence functions as the subject as it is the topic of the sentence.
A noun phrase is a word or group of words that has a noun and functions as subjects, objects, prepositional object and as predicative expressions. Noun phrases can be long in length and each and every component of the noun phrase can be changed.
Rhenium is the very dangerous (hazard wise) it should be handled carefully and you should understand that THIS should not be taken lightly I hope this helps!:)
