Final answer:
The correct option to complete the sentence is 'la sombra'.
Step-by-step explanation:
The correct option that completes the sentence is 'la sombra'.
In this sentence, 'Lolita compra' indicates that Lolita is the subject and that she is buying something. The options 'las pulseras' (the bracelets), 'los aretes' (the earrings), and 'el labial' (the lipstick) are all feminine, so they are not appropriate. The option 'la sombra' (the eyeshadow) is the correct choice because it agrees in gender with the subject 'Lolita' and completes the sentence grammatically.
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