The best fire extinguisher would the kind that is well-placed and easy to use. Look for a labeling classification of A:B:C, which indicates that the extinguisher can put out the three main types of fires - ordinary combustibles, flammable liquids, and electrical.
Liquids
flammable liquids
Class B fire extinguishers are best suited for fires involving flammable liquids, such as gasoline, oil, grease, and solvents. These extinguishers typically use foam, dry chemical, or carbon dioxide agents to effectively smother and extinguish the flames. They should not be used on fires involving ordinary combustibles (Class A) or electrical equipment (Class C) unless specifically rated for those classes as well. Always check the extinguisher label for specific applications.
There are different types of fire extinguishers. For a boat it would be best to get a portable type like those designed for use in automobiles.
Fire extinguishers are best used on incipient (at the beginning) fires.
The question being asked
symmetric DSL (SDSL)
A bar graph would be best suited for comparing the sales of two different types of toys at a toy store. It allows for a direct visual comparison of sales figures between the two types of toys.
bar graph
Ordinary combustibles, such as wood, cloth, paper, burning liquids such as gasoline, and fires in live electrical equipment. They are not for deep fat fryers (class K) nor for combustible metals such as magnesium (Class D fire).
Because there are so many possible different kinds of fires in a home you are best to get an extinguisher with at least an ABC class rating. These ratings are for different types of fires.
A padded and adjustable guitar strap would be best suited for both acoustic and electric guitars, providing comfort and support for playing both types of instruments.