I would assume they want you to discuss the evolutionary lineage of modern humans or otherwise known as Homo sapiens. Human evolution is basically the same as other animals but there is one major difference. We have a very complex culture and the evolution of our culture has a great impact on which groups survive so it affects humans to a greater degree than other animals.
The following is a list I made of the likely lineage of our ancestors.
Modern humans 200,000
Homo heidelbergensis 500,000 to 200,000 years ago
Homo erectus 1.5 to 0.5 mya (million years ago)
Homo ergastor 2 mya
Homo habilis/rudolfensis 2.5 mya.
Australopithicus Africanus 3 to 2.5 mya
Australopithicus Afarensis/Anamensis 4- 3 mya
Ardipithecus ramidus 4.5 mya
Orrorin tugenensis 6 mya
Sahelanthropus tchadensis 7 mya
Dryopithecus 12 - 9 mya
proconsul 12 - 20 mya
earlier primates similar to modern monkeys 20 - 35 mya
earlier primate similar to lemurs 35 to 50 mya
first primates 60 mya
dryomomys 65 mya http://www.flmnh.ufl.edu/sciencestories/2007/bloch_primate.htm
tree shrews >65 mya
therapsids including early mammals 250 to 100 mya
Pelycosaur including Dimetrodon 280–265 mya
amniotes or first terrestrial reptiles 340 mya
first amphibians
Ichthyostega or fish with legs 365 mya
Sarcopterygii or lobed fin fishes 380 to 365 mya
Osteichthyes or bony fishes 450 mya
Chondrichthyes 455 mya
earliest vertebrates 510 mya
first eukaryotes about 1.5 bya
bacteria >3.5 bya
life more primitive than anything alive today which we have only clues about what it was..