1. What kind of tectonic boundary would be evidenced by down-dropped blocks of rock and shallow-focused earthquakes?

divergent boundary

Explanation:

There is the "mid-oceanic ridge or divergent plate boundaries that has normal fault or down droped blocks bounded tectonic setting because plates are moving away from each others and normal faults are taking place as result of the gravity or rifting in plate.

There is shallow focused earthquakes at mid oceanic ridge, are occurred due to deformation or fault within the plate.