Concept:Problems in harnessing solar energy include high costs, poor technology, and unreliability.
Having enough capital is a supportive factor, not a problem.
Explanation:Solar energy systems require expensive technology and maintenance.
In many areas, technological know-how is limited, making adoption difficult.
Solar power is also unreliable because it depends on weather and daylight.
However, "adequacy of capital" means sufficient funds are available.
This availability of money actually helps in harnessing solar energy.
Therefore, it is not a problem.
Answer:B. Adequacy of capital