Check all that apply.

Make a connection. Why do you think there were so many farmers who needed training in the Great Plains in the late 19th century? Select three reasons.

The was a decrease in immigration, so the supply of food increased.

The Homestead Act brought many people to the Great Plains who had never farmed before.

The Great Plains required dry farming techniques because of the scarcity of water.

The Great Plains required wet farming techniques because of the abundance of water.

There was an increase in immigration, so the demand for more food increased.

The Homestead Act brought many people to the Great Plains who had never farmed before.

The Great Plains required dry farming techniques because of the scarcity of water.

There was an increase in immigration, so the demand for more food increased.

The three reasons that apply are:

1. The Homestead Act brought many people to the Great Plains who had never farmed before.
2. The Great Plains required dry farming techniques because of the scarcity of water.
3. There was an increase in immigration, so the demand for more food increased.

To find the correct answers to why there were so many farmers who needed training in the Great Plains in the late 19th century, let's go through each option and evaluate whether it applies to the situation.

Option 1: The decrease in immigration, so the supply of food increased.
Explanation: This option is not relevant to the question since it discusses the supply of food, not the need for training.

Option 2: The Homestead Act brought many people to the Great Plains who had never farmed before.
Explanation: This option is a valid reason. The Homestead Act encouraged settlement on the Great Plains, attracting many people who lacked farming experience and therefore needed training.

Option 3: The Great Plains required dry farming techniques because of the scarcity of water.
Explanation: This option is also a valid reason. The Great Plains have limited water resources, which necessitate the use of dry farming techniques. Farmers unfamiliar with these techniques would require training.

Option 4: The Great Plains required wet farming techniques because of the abundance of water.
Explanation: This option is incorrect. The Great Plains are known for their scarcity of water, making wet farming techniques impractical.

Option 5: There was an increase in immigration, so the demand for more food increased.
Explanation: This option is not relevant to the question, as it discusses the demand for food rather than the need for farmer training.

Given the explanations above, the three reasons for why there were so many farmers who needed training in the Great Plains in the late 19th century are:

1. The Homestead Act brought many people to the Great Plains who had never farmed before.
2. The Great Plains required dry farming techniques because of the scarcity of water.
3. The Great Plains required wet farming techniques because of the abundance of water (this option is incorrect, so we are left with two valid reasons).

Therefore, the correct answers are options 2 and 3: the Homestead Act and the need for dry farming techniques.