Which statement best tells how the underlined words in the paragraph are related?

i was aunt mimi cook noodles for a pan of lasagna. after i filled a pot full of water, aunt mimi added some salt to it. when i asked her why she put salt in the water, she told me that the salt acts as a catalyst and creates a reaction. the salt increases the rate at which the water will begin to boil. this way the water boils faster, so the lasagna noodles will be ready quicker.

both are words that tell why noodles are cooked in boiling water.

both are words that tell how to make lasagna.

both are words that tell how to make the water boil faster.

both are words that tell about the use of salt.