After chromosomes are formed, during which phase of mitosis do the chromosomes attach to the spindle fibers by their centromeres?

Metaphase is when the chromosomes attach to the spindle fibers by their centromeres
This can be confused with the phases:prophase where the spindle fibers form a bridge between the ends of the cell, and anaphase where the spindle fibers draw the chromosomes to the opposite ends of the cell(the cell splits up)

The equator absorbs the most sunlight

When you are making a guess you are forming a hypothesis