How do you customize calendar view

In which part of a professional email should you try to be brief, but highly descriptive?

Font size, font style, and are all aspects of character formatting.

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