Final answer:
Thromboxane is released by activated platelets, enhancing platelet aggregation and contributing to the formation of a platelet plug to prevent blood loss.
Step-by-step explanation:
The substance thromboxane plays a crucial role in the process of hemostasis. When platelets are activated by an injury to a blood vessel, they release thromboxane, which is a powerful vasoconstrictor and stimulates other platelets to activate and aggregate at the site of the vessel injury. This results in the enhancement of the platelet aggregation, contributing to the formation of a platelet plug to prevent blood loss. Therefore, the correct answer to what thromboxane does to other platelets is (c) Enhances platelet aggregation.