Final answer:
Intra-industry trade involves the sharing of activities between two separate products or services. Splitting up the value chain means that different stages of production occur in different countries.
Step-by-step explanation:
Intra-industry trade occurs when the value chains of two separate products or services share activities.
It involves the import and export of the same products at the same time, such as cars, machinery, and computers, between economies with similar income levels.
The concept of splitting up the value chain means that different stages of producing a good take place in different countries around the world.