Concept:Plantation agriculture is a large-scale farming system that relies on extensive land, consistent water supply, and heavy investment.
Explanation:The requirements given match plantation agriculture directly.
Plantation farming uses thousands of hectares for a single cash crop.
Crops such as cocoa, tea, coffee, and oil palm require reliable moisture from rainfall or irrigation.
Running a plantation involves high capital for land clearing, planting, machinery, labour, processing, and transport.
Lumbering uses forests, but it does not need irrigation or heavy plantation-scale capital in the same way.
The tourism industry and mining do not depend mainly on continuous water supply or thousands of hectares of farmland.
Therefore, the activity described is plantation agriculture.
Answer:A. plantation agriculture