What type of information does italicized writing provide?

What role does the bolded pronoun serve in the following sentence i like my skateboard quite a bit but i like yours better

Oceans produce approximately 80 percent of the oxygen our planet needs to support animal life. pollution that reaches the ocean through dumping, oil leaks, runoff, and other processes interferes with that oxygen production and poses a real threat to the oxygen content in our atmosphere. if the oxygen content decreases, it is likely that carbon dioxide will increase. this could have dramatic consequences for life as we know it. which does this passage indicate causes a decrease of oxygen in the atmosphere?

Read the following claim and counterclaim from an essay claim: a plant-based diet is best for extending one's life. counterclaim: the american heart association suggests people should eat two servings of fatty fish each week which of the following statements is the most relevant rebuttal to the counterclaim? o a. even though fish is recommended, eating it only twice weekly will keep the fatty fish from making you gain weight. o b. fatty fish is not recommended on a daily basis, and it can contain mercury from water pollution. c. fatty fish is a good source of protein, but it can be substituted by plant-based proteins, such as beans, seeds, and nuts. o d. many people don't like fish anyway, so if you have to do without fish or meat, which would you choose? non