Vṛtti means the process of sustenance, by which the moving beings live upon the nonmoving beings. For a human, vṛtti specifically means acting for one's livelihood in a manner suited to his personal nature, either by desire or according to regulation. The previously mentioned sthāna or sustenance is here called vṛtti. That is explained in this verse. Because of desire, in general, the sustenance of the moving beings is the non-moving beings, and sometimes even other moving beings, indicated by the word ca. Among men, sustenance of the body according to one’s nature out of desire or by regulation is called vṛtti. The whole of the earth is the shelter for the moving and non-moving beings. In relation to this the earth globe is described in the Fifth Canto.