Sort the questions based on whether they are better answered by an observational study or a controlled experiment

The answer is c.  na2haso4  and na2so4

Into because calcium makes cells

Answerall of the above good luck

Hey there! so, when you drop a temperature, in any fruit, this would make any fruit go bad, it would get nasty, it can get squishy and then just turn down.so, from looking at your option's, your correct answer would be    c) a drop in temperature caused the peach to experience a physical change.