Explanation:

Oral communication is the process of expressing information or ideas by word of mouth. Oral communication is the process of verbally transmitting information and ideas from one individual or group to another. Oral communication can be either formal or informal. Examples of informal oral communication include:

1. Face-to-face conversations
2. Telephone conversations
3. Discussions that take place at business meetings

More formal types of oral communication include:

1. Presentations at business meetings
2. Classroom lectures
3. Commencement speeches given at a graduation ceremony