CLEAN : Spanish PM talks investments with Brazilian counterpart

What is the primary focus of the 'Back' concept introduced in the video?

• A fundamental idea

• A historical event

• A new technology

• A mathematical formula

In which scenarios is the 'Back' concept most commonly applied?

• In scientific research

• In financial planning

• In everyday decision-making

• In artistic expression

What is a key takeaway from the conclusion about 'Back'?

• It is essential for understanding certain processes

• It is a complex theory

• It is rarely used

• It is outdated