Homo Erectus' Key Capabilities for Survival

Homo Erectus had  a few Key Capabilities that helped this species to survive 1.8 million to 200000 years ago.One important key capability was that Homo Erectus was stood upright.  They can go far away. They can walk and run very well. They can run away from animals and spread out from Africa to another countries so they can survive longer by lived in many countries.  Another key capability was they used fire. They cooked the animal meat with fire and they could survive in cold. They also protected themselves against to the animal with fire and keep warm. The last key capability was that they used tool. They used stones to make tools. They can invent more tools and the tools were complex. They can use these tools to hunt animals and do something else.
  
Reference: http://www.google.com.my/imgres?imgurl=http://www.dkimages.com/discover/previews/942/664837.JPG&imgrefurl=http://bensbreakfast.blogspot.com/2008/04/homo-erectus-without-holding-on.html&usg=__DXjCJVnNjOnu6XoWwGbNIDomHmY=&h=425&w=350&sz=31&hl=en&start=0&zoom=1&tbnid=HyjpJfg0aD5nBM:&tbnh=116&tbnw=96&prev=/images%3Fq%3DHomo%2Berectus%26hl%3Den%26sa%3DX%26biw%3D1280%26bih%3D534%26tbs%3Disch:1&itbs=1&iact=hc&vpx=529&vpy=78&dur=4721&hovh=247&hovw=204&tx=133&ty=114&ei=702ETKybMYrSuwO8-c3_BQ&oei=wE2ETIqoGoievQPgopzwCg&esq=6&page=1&ndsp=27&ved=1t:429,r:3,s:0