Answer: d. Movement
Explanation:
Movement is one of the themes of Geography and includes migration of people, transportation of goods and trade.
Movement has become integral to the globalization process as it has enabled countries to share cultures and seek better standards of living by sharing resources be they human or commodity based. For instance, movement of skilled labor from a country with highly skilled labor to one with relatively lower levels of skilled labor will lead to a rise in the skill level of the latter.
