Brown eyes (b) are dominant to blue eyes (b). the presence of freckles (f) is dominant to the absence of freckles (f). what is the probability that two people who are heterozygous for both traits will have a child that has blue eyes and no freckles?

It could be cuz of their decendants and/or their relatives

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. 

The last option water because it is slow