To be more efficient in formatting tasks, it is important to follow best practices when designing type. Which scenarios show the applications of best practices when designing type? Check all that apply.

4. what is the reason for including the following code snippet in the header file animal.h? #ifndef animal_h #define animal_h class animal { public: animal(); animal(double new_area_hunt); void birth(); void hunt(double new_area_hunt); void death(); double get_area_hunt() const; private: double area_hunt; }; #endif