Final answer:
The upstream/inbound portion of the global supply chain includes suppliers, partners, and vendors, who provide necessary inputs for the production process.
Step-by-step explanation:
The three groups that are part of the upstream/inbound portion of the global supply chain are suppliers, partners, and vendors. These entities are responsible for providing goods and services that move towards the production processes of companies. They play a crucial role by ensuring that businesses have the necessary components, raw materials, and services required for the creation of products. An understanding of their roles is important when looking at the dynamics of supply and demand, particularly in relation to the foreign exchange markets, where firms involved in international trade need to manage the costs related to these upstream supply chain participants.