。
She rode a camel.
Literal
[topic-は] camel [on-に] rode.
乗る ('to ride, board') takes に for the vehicle or animal being mounted, treating it as the destination/landing point of the boarding action — distinct from English 'ride' which takes a direct object. The verb covers cars, trains, planes, bikes, horses, and camels alike. らくだ ('camel') is conventionally written in hiragana or katakana — the kanji 駱駝 exists but is rare. The choice of hiragana here gives a softer, more storybook feel.