Answer:
not sure if this helps but. 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, develop alternative concepts to meet the needs, and select a preferred one as the basis for subsequent system or capability development
Well I'd say true because fluorine helps build the outer shell of the teeth. It's basically scrubbing something like car polish. It helps build up protection for the teeth.
Answer:Eating healthy becomes especially important as you age.
Explanation:
Answer:
Cardiac compromise
Explanation:
Cardiac compromise is basically talking about any kind of heart problem. Heart problems can present many symptoms (mainly chest pain and such). This is the best answer b/c the rest of the options are specific for a particular part of heart and thus have limited type of symptoms, whereas any kind of heart problem can have wide array of symptoms.
