what types of data would a meteorologist need to collect to demonstrate the presence of a cyclone in a specific region?

Surface temperature and lower air pressure.

Explanation:

Surface temperature and lower air pressure are the types of data would a meteorologist need to collect in order to demonstrate the presence of a cyclone in a specific region. For the formation of cyclone, warm and moist air is required so surface temperature and lower air pressure are the data that gives information that the cyclone is present in a particular area or not.

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

it's diluted or concentrated

in a diluted solution, you can add a lot more solute but in concentrated only a little more can be added