How can people in Hinduism be reborn?

One major belief of Hinduism is Karma: the ideal that one is reincarnated, that is, reborn after death, in a higher or lower status than their previous life, based on the good or bad deeds their previous life did. For example, a petty thief may be reborn as an ant or a sewer cleaner, whereas a virtuous noble could be reborn as a prince or a multi-millionaire.