And give me the correct answer only!

read the passage about butterflies.

butterflies with purple wings used to be dominant in an environment. over a period of time, it was observed that yellow butterflies were becoming the dominant color.
what is the most likely reason for the change in the butterfly population?

a. birds ate most of the sick yellow butterflies, allowing the purple to reproduce more.

b. there were fewer yellow butterflies, so they were able to reproduce at a faster rate.

c. the yellow butterflies were not eaten by birds and were able to reproduce more.

d. the purple butterflies stopped reproducing and only the yellow butterflies reproduced.

Where does all the water go? according to the environmental protection agency (epa), in a typical wetland environment, 39% of the water is outflow; 46% is seepage; 7% evaporates; and 8% remains as water volume in the ecosystem (reference: united states environmental protection agency case studies report 832-r-93-005). chloride compounds as residuals from residential areas are a problem for wetlands. suppose that in a particular wetland environment the following concentrations (mg/l) of chloride compounds were found: outflow, 60.4; seepage, 73.7; remaining due to evaporation, 26.4; in the water volume, 46.8. (a) compute the weighted average of chlorine compound concentration (mg/l) for this ecological system. (round your answer to one decimal place.) mg/l (b) suppose the epa has established an average chlorine compound concentration target of no more than 58 mg/l. does this wetlands system meet the target standard for chlorine compound concentration? yes. the average chlorine compound concentration (mg/l) is too high. yes. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is lower than the target. no. the average chlorine compound concentration (mg/l) is too high.

The rapid decomposition of organic matter produces evidence which supports: the slow accumulation of coal deposits long ages of the earth rapid burial of vast amounts of vegetation biblical account of noah's flood

What happens during the experiment stage of the scientific method