Final answer:
Juno sent the god Mercury to convince Dido to support the Trojans. Mercury is known as the messenger of the gods and often facilitates communication in mythological stories.
Step-by-step explanation:
The divinity that Juno sent to convince Dido to care for the Trojans was none other than Mercury (Hermes in Greek mythology), the messenger of the gods. The reference to Mercury's involvement is aligned with his traditional role in mythology as a mediator and messenger, delivering communications from one god to others, or from gods to mortals. As the god of travel, commerce, and communication, Mercury was often depicted with winged sandals and a caduceus, signifying his ability to move swiftly and carry messages effectively.