Yes humans do have the obligations of preserving the habitats of chimpanzee as it is considered as an endangered species. Most of the human practices such as tree logging, environment pollution, exploitation of animals and others has led to many species being endangered to extinction.
The answer is A I believe
The DNA carrying a silent mutation will have no gene expression or result on the phenotype or physical appearance of the organism. Silent mutations code for the same amino acid resulting in more genetic diversity, having a genotypic advantage, but providing no noticeable differences.