Slate is a metamorphosed rock made from the sedimentary rock a. shale b. limestone c. sandstone d. conglomerate

A. Shale

Explanation: Sedimentary rocks are converted into metamorphosed rocks under high temperature and pressure. Shale is a sedimentary rock which get converted into slate under high temperature and pressure. Shale is a sedimentary rock made up of volcanic ash or clay while slate is a fine- grained , homogeneous metamorphosed rock. Slate can be found in many colors such as- grey, green, pale to brown.

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.

an electric circuit