The biologist is the person who would be interested in determining the existence of any pattern or characteristics with in a species and relate it to the characteristics possessed earlier by the species.
All these three i.e biologist, chemist and geographer can use their knowledge to find out the reason behind the problem and hence suggest a corrective measure based on their findings/understandings
Explanation:
Biologist - A biologist study about the genetic structure of an organism and study about its DNA and specific traits that are carried from its for fathers to parents and then to itself. Thereby a biologist can construct a evolutionary tree and hence find out about the root cause of any hereditary issue. Also the/she can inspect the organism physically and thus find the reason behind the problem and could suggest corrective measure
Geographer - A geographer can help in finding the relation between the problem persisting in the organism and the environmental factors that are causing it or adversely affecting it thereby enhancing the problem.
Chemist - A chemist has a good understanding of chemicals and medicines and thus he/she can provide probable solution in terms of using effective medicines or chemicals to cure any biological problem
