Please help I'm behind

The first answer is rainfall, and the second answer is the last one

Explanation:

1.

Rainfall is measured with a rain gauge in inches/millimeters - Most modern rain gauges generally measure the precipitation in millimetres in height collected on each square meter during a certain period, equivalent to litres per square metre. Previously rain was recorded as inches or points, where one point is equal to 0.254 mm or 0.01 of an inch.

2.

Climate is the weather conditions prevailing in an area in general or over a long period. The other 3 describe the weather conditions in a place for just a week, or day while climate is measured annually (basically over a long time)

Good luck with the rest of your exam, I hope you catch up with all your work and do well :)

b. the carbon cycle ensures living things have a source of hydrogen

a

explanation: