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In Yoruba culture, several traditional customs (\u00e0\u1e63\u00e0) mark different stages and events in life, each with its own name. \u00cck\u00e0w\u00e9 refers to the practice or culture of reading. \u00cck\u00f3r\u00e8 is the harvest festival, celebrating the gathering of crops such as yam or maize. \u00cc\u1eb9\u0300y\u00e0 relates to separation or parting. \u00ck\u1eb9\u0301 \u1ecdm\u1ecd (the naming ceremony) is the custom performed to welcome and formally name a newborn child, usually within the first seven to nine days after birth, when family and community gather to bless the child and confer its name.

Since the question asks specifically about the custom of celebration connected with a child, the practice that fits is the naming ceremony, because it is the traditional celebration organised specifically to welcome a child into the family and community.

Examination tip: match each Yoruba custom to the life event it marks, the naming ceremony for a newborn child, marriage rites for a wedding, and burial rites for a death.