In the scenario regarding the artist and the gallery, what should the court do regarding the motion?

The appropriate action for the court in this scenario is to deny the motion because there is diversity of citizenship and the amount in controversy meets the required threshold of $100,000.

In civil procedure, diversity jurisdiction allows federal courts to hear cases where the parties are from different states and the amount in controversy exceeds $75,000, leading to the potential for a $100,000 claim to successfully qualify for federal jurisdiction. The presence of diversity of citizenship implies that the artist and the gallery are citizens of different states, which is a key factor in establishing the court’s jurisdiction.

Additionally, the specified amount in controversy is significant as it ensures that cases brought in federal courts involve stakes substantial enough to merit federal adjudication. When both of these criteria are met, it is appropriate for the court to deny any motion that seeks to dismiss the case on those grounds, reinforcing the case's validity for federal jurisdiction.