CLEAN : Images at Sao Paulo stock exchange as Brazil's Petrobras shares plunge

The video tutorial briefly introduces a topic and discusses ongoing events, highlighting key points.

What does the first section suggest about the need for something?

• It is optional.

• It is essential.

• It is not required.

• It is mandatory.

Which section discusses the concept of necessity?

• Third section

• First section

• None of the sections

• Second section

What is the main focus of the second section?

• Past events

• Future plans

• Hypothetical scenarios

• Current activities

Which section implies that something is currently happening?

• All sections

• Third section

• Second section

• First section

What does the third section imply about the status of an action?

• It has been completed.

• It is in progress.

• It is planned for the future.

• It has not been done.