Zippers, which most people use several time each week, we’re not invented until 1893. Underlined portion (which most people use several times each week)
1. The underlined portion is a prepositional phrase
2. The underlined portion is an infinitive phrase
3. The underlined portion is an adjective clause
4. The underlined portion is an adverb clause

the answer is a

explanation:

explanation: in literature, realism focuses on dialogue, characterization, everyday moments and events, the character's psychological development, actions, decisions, as well as believable settings

explanation:

even though there may be variations in human emotions over time, the poem “ a contribution to statistics” by wislawa symborska suggests that the only unchangeable characteristic is mortality.

the author poses a distinction between the approximate and non-approximate numbers which correspond to our need for certainty in life and the difficulty of achieving it. our efforts to measure the exact often fail because the world is not always clearly structured .the poem seems to imply   that the only thing that is certain and has an exact number is death.