Which feature separates humans from other primates? smaller brain size bipedalism use of tools complex social skills

Complex social skills.

Explanation:

Humans actually have larger brains than other primates, so smaller brain size is incorrect.

Other primates, such as chimpanzees, orangutans, and gorillas, all have the ability to use tools, so that is incorrect.

Some primates, such as chimps and baboons, do stand on their hind legs at times, so bipedalism does not separate humans from other primates.

So, complex social skills separate humans from primates.

Hope this helps!

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.