Question

which is one function of a weather balloon?
enables forecasts seven to 10 days in advance
measures conditions in the upper atmosphere
locates and tracks storms and follows the path of storm systems
uses mathematical equations to show what will happen if conditions change

Explanation:

Weather balloons are used to measure conditions in the upper atmosphere. They carry instruments that can measure temperature, humidity, pressure, and wind speed at various altitudes. Forecasts seven to 10 days in advance are made using computer models (not just weather balloons). Satellites and radar are more commonly used to locate and track storms. Mathematical equations for showing what will happen if conditions change are part of weather forecasting models, not a direct function of a weather balloon.

Answer:

measures conditions in the upper atmosphere