I create milk but I am not a cow With a hard shell to protect myself And I look like a human head

I can be a walker, or something commonplace. As a person, I'm vulnerable, as a description, I lack grace. What am I?

A gentle whisper at the summit, where the needle meets its end, guiding hands that seek precision. The top of the iceberg, I do this to my hat for you...

This golden goodness is made from milk. There's also the peanut, almond and apple kind, sweet and soft as silk. The ayurvedic variety is called ghee. And did you know Tibetans put the yak-version in their tea?

Shhh, quiet now. You'll wake the baby. Please, be silent.