3. all elements of the community must be activated, engaged, and integrated to respond to a major or
catastrophic incident
o a true
o b. false

The above statement is true. Here option A is answer

Explanation:

When a particular area has to deal with major or catastrophic incident, all the elements living in the community must be involved in it. Every person should be activated and engage to give a positive response towards an incident which is life threatening.

Every person should follow a a leader who is well expert to deal with catastrophic incident. Through proper management the effect of any incident can be reduced.  

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.