Help plsss o need help

Which type of stress results when two plates push against one another? a. compression b. tension c. force d. shear

Particles vibrate in a rigid structure and do not move relative to their neighbors.

Which of the following is an example of physical change not a chemical change? a) a log gives off heat and light as it burns. b) a tree stores energy from the sun in its fruit. c) a penny lost in the grass slowly changes color. d) a water pipe freezes and cracks on a cold night.