Questions

Agriculture would be a good example of a purely competitive industry.

It develops in a region of  moderate rainfall and limited evaporation. It is agriculturally a poor soil but addition of lime and fertilizers would yield favourable results. Found extensively in northern Canada and northern Russia.

Assessing opportunity cost involves making choices and dealing with consequences.

The main difference lies in the motive of the two parties. The main motive of the hedger is to hedge(minimize) the risk from the occurence of some events. 

The motive of the speculator is to gamble in the market in order to make the profit by buying/selling the derivative products.

The data bus is Bi-directional because the same bus is used for transfer of data between Micro Processor and momory of input / output devices in both the direction.

The required number is SEVEN.

If you remove  S, it becomes EVEN.

Nuclear Power Plant uses a Non Renewable Energy Source.

Non-renewable energy is that source of energy which can not be used again and again. This sort of energy is sustainable to exhaustion.

Non renewable energy is that form of energy which is subject to deletion. This type of energy is of many uses to us. It can be used to produce electricity, heating, cooking, transportation and manufacturing. 85% of the energy used in the industrial processes is form the non-renewable type of energy.