Please help me I need this assignment done today please I really need help!

Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as

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.

Can someone me with 6 to 10 plz this is for masteries test.