Which type of scientific investigation is best for a cause-and-effect relationship?
o collected investigatiga
descriptive investigation
comparative investigation
experimental investigation

C. gemstones they are the only non metallic mineral from the list.

The rate that would change would be the  searching efficiency/attack rate. there are only two other rates in this model: the  growth rate of prey, and the  predator or consumer mortality rate.the  searching efficiency/attack rate is what indicates how effectively can a predator capture its prey whether in the searching process or actual capturing/attacking process. 

How they differently handle their team- hagrid a champion explains this better than me

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