The capacity or power of persons or things to be a compelling force on or produce effects on the action , behavior , opinions , etc ., of others

the eye wink at the hand; yet let that be / which the eye fears, when it is done, to see.

answer: b) bubbling its way

explanation: an adjective is a word or a group of words that modifies a noun (name, thing, place,

in this case, the first option "to heartily enjoy" isn't describing or modifying any noun, the third option "hiking along merrily" is describing an action but it doesn't modify any noun, the last option "beside us" is just a preposition that indicates position, so the correct answer is the second one: "bubbling its way" because it is modifying the noun "stream".

i don't see it in your profile.