SOMEONE HELP reporting for stupid answers

Can someone me with 1 to 4 plz. fast

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?