Can someone help me please

Organisms are more likely to be more preserved in mud than sand because mud is moist and wet, while sand is very dry.

Aphysical change is one that you can put in and remove like a ham sandwich. the stuff you put in there can be changem its not permanet. a chemical change is on that can't be change thats permanet. like when you make a cake and bake it. you can't get those ingredients back.

Maybe you should get some from your teacher and learn more so you can get your grades up and maybe study a bit more