Tumutukoy sa pag-aaral ng wika, relihiyon, lahi at pangkat-etniko sa iba't ibang bahagi ng daigdig.
A. Heograpiya B. Heograpiyang Pantao C. Etniko D. Heograpiyang Pisikal

answer: c.   like someone who knows how to behave in public

c. a group of tribes that formed a confederacy

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".