Answer:
helped measure time with the aid of the sun -> sundial
helped replace heavy writing surfaces such as stone or shells -> paper
helped measure time accurately without sunlight -> clock
helped track days, weeks, and months across a year made
up of 365.5 days -> perpetual calendar
showed that earthquakes are not signs of heavens anger but
natural events -> seismograph
allowed for the printing of Buddhist prayers -> paper
(I'm not sure what option water was supposed to go to)
