Which of the following symbols is closely associated with Christianity?

The symbol that is most closely associated with Christianity is the Cross. The Cross holds profound significance as it represents the crucifixion of Jesus Christ, which is central to Christian beliefs regarding salvation, atonement, and the resurrection. This emblem is seen in churches, art, and Christian symbolism worldwide, serving as a powerful reminder of the suffering and sacrifice of Jesus.

The other options, while they may have specific meanings or associations, do not carry the same universally recognized connotation with Christianity as the Cross does. For example, a cot may be associated with rest or childhood but lacks religious significance. A cortege refers to a funeral procession, which may have contextual associations with death but does not symbolize Christian belief or teachings directly. The term crypt pertains to a burial place under a church and could have connections to historical Christian practices, yet, it does not symbolize the faith itself in the way that the Cross does. Thus, the Cross is the clear and primary symbol connected to Christianity.