Quais as influências culturais das drogas do sertão

What major factors play a role in global warming? 1. human activity and normal climate conditions 2. natural factors and human activity 3. normal climate conditions and abnormal human activities 4. abnormal human activities and natural factors

How would i answer this for an exam?

Find the equation of the line passing through the point (–1, 5) and perpendicular to the line 3x + y = 4.