Which tools can be used for tracing the evolutionary relationships of human evolution?

Evolutionary relationships of humans can be traced by observing the following things:-

(i) Homologous organs:- homologous organs are the one which has the same structure performing different functions. It shows the same ancestral history.

(ii) Analogous organs:- organs which have different structures performing the same function. It shows convergent evolution

(iii) Fossils:- fossils are dead remnants of plants & animals living on earth far back. Fossils provide us with a way to peep into the window of history and to earn a lot about them. Fossils play a major role in tracing evolutionary relationships.

(iv) Molecular structure:- by studying the molecular structure of organism i.e. its DNA sequences one can trace its relationships with other organisms. This is known as molecular phylogeny.