If farmers are concerned about the price of their future crop changing, they can buy futures contracts to lock in a future price for their crop. This allows them to secure a price for their crop ahead of time, reducing the risk associated with price fluctuations in the market.
Selling futures contracts is typically done by those who want to hedge against price increases or speculate on price movements, but for farmers looking to protect their income from potential price drops, buying futures contracts is the appropriate strategy.
The other options, such as planting more or less today, do not directly address the concern of price volatility in the same way that futures contracts