The most obvious is in your use of metre- which varies from ten feet to two, and with no consistency of rhythm throughout. The rhyme scheme of ABBA, BCCB- but after that there does not seem to be any particular scheme at all.
In terms of you topic, while it is interesting it is a little puzzling that in spite of the fact that you have not restricted yourself to the technical requirements of the task that you have still struggled to achieve much clarity.
Finally, there is no clear figurative or metaphorical comparison being made here-at least none which are apparent. This is again a shame, as it was a requirement of the task.
Overall, it does seem that perhaps you have misunderstood this task. It is always important to ensure that you are clear about the expectations of a task prior to submission. ”

A Short Poem

Language knows no barrier
Humans communicate and animals communicate
Humans know the creativity to fabricate
The need is to understand that language is just a communication carrier
It does not matter if it is a six feet tall guy or a bull terrier
Humans can speak animals cannot.
Humans can argue, animals cannot.
Humans talk to each other,
Animals communicate with each other.
Humans communicate in their own language,
Animals communicate with each other which is their language.
Birds chirping
Dog barking
Language indeed has no barriers.