What is the main focus of economics?

Economics focuses more on interactions/marketing / those type of focus

Resource allocation is the main focus of economics.

Explanation:

Man's needs and wants are unlimited but the availability of resources are limited and also due to the uneven distribution of the same economics has evolved into a branch of study consisting of ideas, theories and explanations about resource allocation.

Had there been equal access to resources to all the people, there wouldn't have been a branch of study called economics. It can be studied at a micro level i. e., at the level of an individual and at a macro level i. e., at the level of group.