What evolutionary pressures would lead to Goblins?

A long time ago homo floresiensis split off into two main groups Goblins and Halflings. Now Goblins are an odd little bunch (here's a rough mock up of what a goblin might look like) and I was wondering what evolutionary pressures would lead to Goblins? some basic characteristics of goblins are:

• are as intelligent as humans (don't have any behavioral differences compared to humans)
• are 112.7cm (3.7ft) tall
• have large noses
• have big pointy ears
• have an improved sense of hearing and smell but do have slightly worse eyesight
• have green skin (possibly due to a symbiotic relationship with a type of moss or algae)
• have life spans similar to humans though they do reach sexual maturity a bit faster than humans

Note: magic dose not exist in my story

posted over 4 years ago

icewar1908‭

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