Select the most appropriate word to fill in the blank.

Success is the ______ of taking risks, everybody knows.

by-product 

The most appropriate word to fill in the blank is by-product.

• By-product is an incidental or secondary product made in the manufacture or preparation of something else.
• Burden is a heavy load or responsibility.
• Tension is a feeling of mental or emotional strain.
• Pressure is the force exerted on something by something else.