Some synonyms are :-
■ difference
■ disparity
■ dissimilarity
■ fluctuation
■ alteration, etc.
Refer to the attachment too.
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Hope it helps ⚜
Answer:
Explanation:
Concept development is a set of activities that are carried out early in the systems engineering life cycle to collect and prioritize operational needs and challenges,
Or,
Concept development is a process of developing ideas to solve specified design problems.
B because mountains are north for sure