Christ is The Word
Heavenly Father and Jesus Christ are two separate beings. Thus is Jesus referred to as His Son. In the creation aspect of the earth, Heavenly Father spoke the words of creation, giving Christ the instructions on how to perform the work. Then Jesus went forth and did as was spoken by Heavenly Father, even speaking forth the words of creation, for Christ is the Word of His power.
Below are two verses from the inspired translation of the Holy Bible, as found recorded in The Book of Genesis from the Old Testament.
Because much of the books in the original Bible were lost, and even some of the writings we have changed through incorrect inscribing, as well as through mal-intent, Joseph Smith, a modern day prophet, was prompted and inspired to make inspired translations of certain parts of the Bible, to help restore it to its original state. This work was never fully finished.
These two verses from the rendered restorative work out of The Book of Genesis, are distinguished from The Book of Genesis by being called, The Book of Moses, are helpful insights.
Moses 2:5 reads: And I, God, called the light Day; and the darkness, I called Night; and this I did by the word of my power [who is Christ], and it was done as I spake; and the evening and the morning were the first day.
Moses 1 also tells us of other countless earths created by Heavenly Father and Jesus Christ, of which additional scripture like this tells us that Christ is the Savior of them all, even the entire universe.
In Moses 1:32 we read: And by the word of my power, have I created them (all these earths), which is mine Only Begotten Son, who is full of grace and truth.
As Jesus said, He does nothing except that which He sees, or hears His Father do and / or say. So Heavenly Father spoke the elements to organize, and then Jesus fulfilled His part of the creative process, and this aspect of His role, by creating the earth, as specified by the Father, first spiritually, and then physically.