Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 34 to 38.

Do you have a mobile phone? It can be so useful! Mobile phones help people ___(1)___ in touch with friends and family. Many mobile phones also provide entertainment. They're full of games and ___(2)___ other apps to keep people occupied. If you were to ask most mobile phone users, they'd say their mobile phone definitely makes life easier!
___(3)___, most people don't know about the impact mobile phones have on our ecosystem. If you have ever looked at the inside of a mobile phone, you know they're made of many types of metals. The process of mining for these metals is one major way mobile phones affect the ecosystem. When people mine for metals, ___(4)___ waste is created. It hurts both aquatic and plant life if not disposed of properly. In addition, mining for our phones adds to deforestation as a large number of trees are cut down for mining every year. Moreover, mining for phone production puts more carbon into the air, ___(5)___ adds to climate change, another major concern for our ecosystem. The impact of mobile phones on our ecosystem is expected to grow as many people replace their phones after using them for just a few years and send their old phones straight to a landfill.