The Valar of everything that grows from the biggest tree to the smallest insect.
also responsible for the Ent or Tree-sheperds and in cooperation with Manwé gave life to the great eagles.
But her greatest work were the two trees Telperion and Laurelin created on the mound Ezellohar (And she will never make its like again)
Yavvana enriched the island Andor better known as the realm Númenor and asked to send her servant Curumo (Radagast) along with the Istari.