Which of the following statements correctly expresses collision theory

According to a source, the options that fits the question is reactants collide with reactants to form activated complex that separates into products. This clearly suggest the collision theory. 

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Evaporation: this is when warmth from the sun causes water from oceans, lakes, streams, ice and soils to rise into the air and turn into water vapour (gas). water vapour droplets join together to make clouds! condensation: this is when water vapour in the air cools down and turns back into liquid water.