Very easy and I will mark brainlist Engineers studied how the exterior of the shuttle tank flight.
affected
demostrated
evaluated
tracked
which fits better

If two person had given your answer then there is a option of mark as brainliest. click there in the option of mark as brainliest in which you like the answer most. if any one person has given answer then after some days you will a notification to mark his/her answer as brainliest.