Both Uses

focus
in
Nothing but the Truth
(Auto-generated)

Question four: What is the significance of Jack London's choice in making Buck, the dog in The Call of the Wild, the focus of his novel?†
p. 12.2 *

focus = where attention is concentrated
...So you see, Anita, what intrigues me about this new concept of teaching English—Whole Language—is that it has its focus on literature, and in a way that I think young people will find very interesting.†
p. 77.9 *

Definitions:

(1) (focus as in: Turn your focus to question #2.)
to direct attention or effort toward a single thing; or the ability to do so without getting distracted
(2) (focus as in: The focus of our study is...)
where attention is concentrated or directed
(3) (focus as in: bring into focus; or out of focus)
a state where something has come into view or can be seen clearly; or an adjustment made to permit a clear view
(4) (focus as with technical usage)
technical usage typically involves some sense of center or concentration such as:
- physics — a point where things come together such as the point where light rays meet
- geometry — a fixed reference point (as of a parabola)
- geology — the point of origin of an earthquake
See a comprehensive dictionary for other less common meanings.
(5) (meaning too rare to warrant focus)