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.<span> </span>
You would use home as a reference to it like can we go home and you use house as if come to my house, were is the house
The answer would be C, as it is the only one that makes sense when you read it. Hope this helps.
The answer is D. Culture is the customs of a group like language, religion, values, and cuisine. People who are all part of the same culture can make up an ethnicity.