<u>A persuasive speech</u>.
A persuasive speech is defined as <em>a specific type of speech in which the speaker has a goal of convincing the audience to accept his or her point of view</em><em>. </em>Since what you're looking for is to <u>convince</u> your audience not to drop out of school, then this speech would be the most appropiate.
Definitely not an extemporaneous speech as this is carried out or performed with little or no preparation and that would not push your audience to want to stay in school. Not an entertaining speech because entertaining an audience is not the same as convincing them.
Therefore, you should go with a persuasive speech.
Answer:
Intended/Unintended/Both Some European sailors and conquistadors have smallpox. Sailors come in contact with Native Americans, who contract the disease and die after infecting their relatives and neighbors, who continue to spread the disease. Unintended: Europeans did not intentionally infect Native Americans with diseases. Europeans bring rice and wheat with them and plant the crops in the New World. Rice and wheat become important crops in many parts of North America. Intended: Europeans intended to grow rice and wheat in the New World to supplement the native crops. Europeans take potatoes from the New World back to Europe
Источник: https://educheer.com/essays/consequences-of-the-columbian-exchange/
Explanation: