The infant is then secure in his or her attachment to the caregiver. The caregiver-child relationship establishes the foundation for the development of emotional skills, and sets the stage for future social relationships. A secure attachment leaves the child free to explore the world and engage with peers.
Adding brewer's yeast to the compost pile speeds up decomposition and increases heat. For gardeners who practice vermiculture or raise worms in the compost pile for their castings, the addition of brewer's yeast increases the growth of worms and the quantity and quality of worm castings produced.
Yeast extract is used in most media for microbes from plants and animals. Some of these microbes require vitamins and other growth factors from their plant or animal hosts and yeast extract is rich in vitamins, minerals, and digested nucleic acids.