Final Answer:
Humans believe in their evolution from lower life forms due to extensive scientific evidence from fields like paleontology, genetics, and comparative anatomy.
Step-by-step explanation:
Evidence from fossil records unveils a sequence of species showing gradual changes, supporting the idea of evolution. These fossils, analyzed using radiometric dating, provide a timeline for the progression of life forms over millions of years. Comparative anatomy highlights structural similarities among species, revealing evolutionary connections. Genetic studies, particularly in DNA analysis, demonstrate shared genetic material across different organisms, reinforcing the concept of a common ancestry. The convergence of evidence from these scientific disciplines strongly supports the belief in human evolution from simpler life forms.