Final answer:
The painting 'The Last Drop' by Judith Leyster features a skeleton holding an hourglass, signifying the transient nature of life, making option a) the correct answer.
Step-by-step explanation:
The artwork in question, Judith Leyster - The Last Drop, is notable for its inclusion of a skeleton which plays a significant role in the painting's theme. The correct answer to the question is option a) The skeleton holds up an hourglass to emphasize that time is running out on the party, but also on the lives of those present. This element serves as a memento mori, a reminder of the inevitability of death, which was a common motif in Baroque art to convey the transient nature of life and earthly pleasures. This painting is not a sculpture, nor is it abstract or strictly religious in nature; rather, it fits within the genre of genre painting with moralistic overtones.