Explain which skill— toolmaking, the use of fire, or language—you think gave hominids the most control over their environment.

seeing as no choices were provided, i'll do my best to answer it from knowledge.

job specialization promotes work ethic to the person doing the job. he/she may be strong in the arms and able to lift things, specializing him/her in a job where you lift and carry.

the spanish  

hope this meaning spain btw