Answer:
Answer is A. Learning by doing.
Explanation:
In the far olden days, during the colonial era, the farmers only improve on their productivity through the process of doing it. This involves trial and error process. It is so because, there wasn't technology and no form of modern education that will help them to carry out research before execution, they only depend on their instincts. This means that, they execute what they think and learn from it.
The correct pronoun is their.
Every contestant should wear their best suit on Tuesday.
Their is a personal pronoun that means belonging to or associated with the people or things previously mentioned or easily identified. Therefore the suits belongs to the contestants, there is more than one contestant, we don't know if they are male or female and 'it' refers to objects not people so the correct pronoun is their.
A stock dividend is a dividend payment made in the form of additional shares rather than a cash payout. Companies may decide to distribute this type of dividend to shareholders of record if the company's availability of liquid cash is in short supply.
Framers of the Constitution created a system of checks and balances so no one branch of government would be more powerful than the others.

People play a very important role in the process of development as :
- People themselves are a part of development
- Contribution and a small hand itself from the side of people provide a great help.
- Mutual understanding amoung other people and spreading of awareness.