The activities in primary, secondary, and tertiary sectors are

The correct answer is ​Interdependent.

Key Points

• When we produce a good by exploiting natural resources, it is an activity of the primary sector. 
• It is known as the agricultural and allied sector services.
• The secondary sector covers activities in which natural products are changed into other forms through ways of manufacturing that we associate with industrial activity.
• It is known as the manufacturing sector.
• After primary and secondary, there is a third category of activities that falls under the tertiary sector and is different from the above two.
• These are activities that help in the development of the primary and secondary sectors.
• These activities, by themselves, do not produce a good but they are an aid or support for the production process.
• Hence, option 4 is correct.