Did you know that like us, Christ has three component as a being?

Man is composed of three components: Body, Soul and Spirit according to Apostle Paul.

23May God himself, the God of peace, sanctify you through and through. May your whole spirit, soul and body be kept blameless at the coming of our Lord Jesus Christ. (I Thesalonians 5:23, NIV)

And because Christ is truly a man, he has these too. Christ has body.

52Going to Pilate, he asked for Jesus’ body. 53Then he took it down, wrapped it in linen cloth and placed it in a tomb cut in the rock, one in which no one had yet been laid. (Luke 23:52-53, ibid)

He has spirit too.

46Jesus called out with a loud voice, “Father, into your hands I commit my spirit.” When he had said this, he breathed his last. (Luke 23:46, ibid)

And lastly, he has soul too.

27 “Now My soul is troubled, and what shall I say? ‘Father, save Me from this hour’? But for this purpose I came to this hour. (john 12:27, NKJV)

I just want to make it clear that the spirit that Christ surrendered to the Father is not the spirit that most of us are thinking. This is because there are people, especially those who are Catholics believe that the spirit surrendered by Christ to the Father is the so-called-by-catholic SOUL. Soul is different from Spirit and Spirit is not the Soul (see When Man Dies What Happens?)
Why did Christ surrendered his spirit to the Father? The answer is, because Christ is truly man. Man when dies, the spirit will return to God, because it is God who gave it.

7 Then the dust will return to the earth as it was,
And the spirit will return to God who gave it. (Ecclesiastes 12:7, ibid)

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