The focus is directing attention towards a particular thing of a person.
The concentration requires energy.
This energy associated with concentration flows towards the subject of attention.
Both focus and concentration are different properties of attention.
Both these properties require thinking skills that all humans possess.
Maintaining tension is the core value of both these features.
Focus and concentration are used when a person aims at the completion of a task in the mix of distractions.
Both of these require complete energy put at one place that is determined by the person's will.
Commanding the mind according to the requirement of the time is the basic task in focusing.
There are varying degrees of concentrations.
These features require the elimination of all the unnecessary task and distractions.
Focus and concentration are important aspects in the life of a human being.
All the achievement that humans have accomplished are because of the attention they have paid to the different aspects of life and nature.