Eros is one of the four loves named by C.S. Lewis in The Four Loves. In that 1960 book, Lewis discusses affection, friendship, erotic love, and charity, using both everyday experience and Christian reflection.
The Greek terms often associated with the book are storge for affection, philia for friendship, eros for sexual or romantic love, and agape or caritas for charity. Lewis’s English labels are more important to the book’s structure than a rigid four-word Greek taxonomy, but the Greek vocabulary helps explain common summaries.
Eros is therefore a correct answer, while philia, storge, and agape are not wrong concepts in the wider discussion of love. They are also names commonly connected with the other categories. That overlap makes the question difficult unless the reader knows Lewis’s specific framework.