What is the estimated percentage of tropical rain forests that remain compared to their original coverage? 

Less than 6%

The answer is c) less than 6%.

According to estimates, only a small percentage of the original tropical rainforests remains intact today. It is estimated that less than 6% of the original coverage of tropical rainforests is still preserved in its pristine state.

The vast majority of tropical rainforests have been lost or significantly degraded due to human activities, such as deforestation, logging, agriculture, and infrastructure development.

This loss of tropical rainforests has had severe consequences for biodiversity, climate regulation, and ecosystem services. Conservation efforts are essential to protect and restore these valuable ecosystems and the diverse life forms they support.