What skills must a 1-year-old child have?

See below. Most one year old children are crawling, pulling to stand, cruising, saying mama and dada, doing imitative behavior, and starting to become independent. They will enjoy peek-a-boo, pat-a-cake, etc. They are also normally waving. However, there is a lot of variability in development. And the whole child's picture needs to be taken into account. Any concerns should be discussed.