Is a tropical rainforest vegetation similar or different to the natural vegetation

ITS DIFFERENT

Natural vegetation comprises forests, shrubs and grasses, and is determined by climatic conditions and soil types. ... Soil formation on the hill slopes is a prerequisite for forest growth, but human practices in these areas have contributed to erosion, rather than to soil formation.

The tropical vegetation at this layer generally consists of shade-tolerant shrubs, herbs, small trees, and large woody vines which climb into the trees to capture sunlight. Only about 5% of sunlight breaches the canopy to arrive at the understory causing true understory plants to seldom grow to 3 m (10 feet).