The hilly terrain of Meghalaya poses challenges for:

The correct answer is: d) All of the above.

The hilly terrain of Meghalaya poses challenges for irrigation and mechanization, soil conservation, and crop diversification.

• Irrigation and mechanization: The hilly terrain makes it difficult to build irrigation systems and to use machinery for farming. This can lead to lower crop yields and higher costs of production.
• Soil conservation: The hilly terrain is also prone to soil erosion, which can lead to the loss of topsoil and nutrients. This can make it difficult to grow crops and can also lead to environmental problems such as flooding.
• Crop diversification: The hilly terrain also makes it difficult to grow a variety of crops. This is because different crops require different types of soil, water, and sunlight. As a result, farmers in Meghalaya often have to focus on growing a single crop, which can make them more vulnerable to changes in the market.

In addition to these challenges, the hilly terrain of Meghalaya also makes it difficult to access markets and to transport goods. This can make it difficult for farmers to sell their produce and can also lead to higher prices for consumers.