Answer: they are used to measure and keep things precise during constuction
Explanation: because if you watch videos and look up info and research it tells you about their jobs and what they use for their jobs
1.Tyrannosaurus Rex Lived in the Mesozoic Era
2.The largest mass extinction happened in the Paleozoic Era
3.Life exploded for the first time in the Precambrian Era
4.The Chicxulub crater in the Cenozoic Era
C Chromosomes break at centromeres,and sister chromatids move to opposite ends of the cell.
Primary eats grass and plants and the secondary eats the primary to get the energy it needs to live
For me i’ll say the answer is A bit i might be wrong so do what’s best for you
