This material world means sense gratification. This is the meaning of material world. So in the material world there are 8,400,000 forms of life, we know very well. And from aquatics, jalajā nava-lakṣāṇi sthavarā lakṣa-viṁśati (Padma Purāṇa); from aquatics to different life-forms and fishes. From water, trees are coming. Water, big water, trees are coming out, and then gradually it is becoming land, like that.
So just see how perfect the Vedic description for . . . throughout the whole planet. Not only whole planet; half of the universe was merged into water, then gradually the planets came out, and we can see on this earthly planet three-fourths now. Formerly it was covered with water, now three-fourths water, one-fourth land. How land comes out? That I have seen this time. There are many islands, more than 300 islands, small ones. They have come out of the sea. And big.
So how scientifically it is described: jalajā nava-lakṣāṇi. First, because there is water for aquatics, then as land comes out, the trees come out. Sthāvarā lakṣa-viṁśati. Sthāvarā means these trees and plants, they cannot move. These trees and plants, they have to stand up on this; they are called sthāvarā. Those who can move, they are called jaṅgama, sthāvara-jaṅgama. That is very scientifically. Eh?
So why they have, the living entities, part and parcel of God, why there are varieties of life? The reason is that varieties of desires, to enjoy. Varieties of sense gratification. Just like you, in your Western countries, so many assets. Huh? Nowadays I find, asset has increased. There are different degrees, that's all. You will not find any standard. Formerly, in our childhood, you used to see European family man, there is one dress.
And nowadays you see so many varieties of dress. Anyway . . . as it is practical, because we have got varieties of desires, we dress ourselves in different fashionable clothes. So this varieties of life mean they have different desires, and Kṛṣṇa is fulfilling their desires. Ye yathā māṁ prapadyante (BG 4.11).