4. Son las plumas de ella
Answer: the classical period
Explanation:
Writers and craftsmen of the neoclassicism like Alexander Pope, Jonathan Swift and Josiah Wedgwood, found their inspiration from the classical period. Their works adopted the style, genres, aesthetic values and subjects of Greek and Roman writers.
The only one here that sounds correct and uses it correctly is
"Ellos la compran para mi"
It's basically saying "They buy it for me"
-Hope it helps!