When you're creating a form you can select the type of question you want here.
Or you can edit the question types of an already existing form by clicking the configure form button once you've selected the form.
Open-ended questions can be answered by text input and encourage an in-depth detailed expansive response. The open-ended option is perhaps the most flexible and can be used in an infinity of scenarios.
Yes/No questions offer two different answers to your question in a TRUE/FALSE fashion. You can customize the Yes and No to display different values.
Multiple choice questions offer different choices as answers. You can have up to 25 different choices per question and they can be fully customized.
Numeric questions only allow numeric values as responses; any attempt to answer with a value that's not a number will be rejected and the question will be prompted again.