Which component of weather results in stormy, cloudy whether?

Im pretty sure it is precipitation.

Explanation:

When precipitation occurs then we get rain, snow, or hail and usually has dark clouds.

this protocol provides a detailed procedure for co-immunoprecipitation (co-ip) to identify protein–protein interactions.

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!