Answer:
Seismograph- showed that earthquakes are not signs of heavens anger but natural events allowed for the printing of Buddhist prayers.
Water Clock- helped measure time accurately without sunlight.
Paper- helped replace heavy writing surfaces such as stone or shells. Allowed for the printing of Buddhist prayers.
Sundial- helped measure time with the aid of the sun.
Perpetual Calendar- helped track days, weeks, and months across a year made up of 365.5 days.
