You find a sedimentary rock that contains pieces of igneous rock. what is the best explanation for how pieces of igneous rock got there?

There are dozens

Explosive materials such as pumices, lapilli and ashes may be blown by volcanoes thousands of kilometers around and fall in a sedimentary basin.
Erratic are all sorts or rocks transported by glaciers and abandoned wherever the lower altitude will stop their front. Rivers also transport materials from one basin to another. So does the wind.
Rocks of continental origin, such as sandstones, conglomerates etc. are all sedimentary rocks and may well contain igneous fragments.

The eyes are not fully developed and functioning perfectly when they are first born, It will take several more weeks before their eyes mature and their eyesight begins to approach normal.