A student wants to include a visual aid in her science presentation on global warming. Which visual aid is the best one for her to use?

Four drawings of earth. First is earth shaped like a lightbulb. Second is earth burning. Third is a pair of hands holding the earth. Fourth is the earth wearing a water bottle and scarf, with a thermometer and pills nearby.

A map of earth titled 1999 to 2008 Mean temperatures. The map shows temperature anomalies in degrees centigrade.

A graphic titled 7 day forecast showing 7 days in separate boxes with icons for different types of weather and low and high temperatures for each day.