Answer:
Comparative anatomy and genetic analysis
Step-by-step explanation:
Comparative anatomy is less reliable as it is the process of comparing two species physically to determine how related they are. This can be effective in certain cases, such as big cats, that all look similar because they are closely related. This doesn't always work though because species in similar environments can adapt similar traits for survival. For example, dolphins and sharks have fins but different ancestors. DNA analysis is more accurate. More similar DNA = closer relation between organisms.