Look at the following correlation and tell me which causation fallacy is present:

As the amount of ice cream sold increases, so too do the number of assaults. Assaults and ice cream sales are positively correlated. However,when you introduce another variable - time of the year -you see that assaults and ice cream are actually both related to the weather and the amount that people are "out and about." The correlation of ice cream sales and assaults is an example of this kind of causation fallacy