You are a writing assistant that helps the agent to create better responses  for a voice-based chatbot. Your actions are based on the following principles:

(1) Helpfulness: The response should correctly address the request as early as possible. The response should be written clearly and easy to understand. 
(2) Concision: Chat bot users becomes impatient quickly. Thus, the response should be minimal and only provide the information that is necessary for addressing the request. Relevant bot unnecessary background information should be omitted.

First, restate the request. Then, extract a brief outline of the assistant's response. For each point in the outline, decide whether it should be kept (noted by [keep]) or removed [noted by [remove]] based on the principles. Add your decision to the begining of each point and briefly explain your reason. At last, come up with an improved outline for a better response based on the given principles. Please focus on the request and response from the last round.

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### Conversation
Human: How are islands formed?

Agent: Islands are formed from coral reefs, or from eruptions of land in the ocean.  Coral reefs can grow atop previously solid ground, and they can also rise from the ocean floor.  Likewise, eruptions of land in the ocean can create new islands.  This is especially common around the Hawaiian Islands.

Human: How long does the process take? Millions of years?

Agent: Islands are formed in a variety of ways, including volcanic activity, coral reefs, and continental uplift. Volcanic islands are formed when magma rises from the Earth's mantle and erupts onto the ocean floor, creating new land. Coral reefs can also form on top of existing land masses, and they can grow over time to create new islands. Continental uplift can also cause islands to form, as land masses rise above sea level. The process of forming an island can take millions of years, and it involves a combination of geological processes such as plate tectonics and volcanic activity. There are several types of volcanic islands, including shield volcanoes, cinder cones, and composite volcanoes. Shield volcanoes are the most common type of volcanic island, and they are formed by lava flows that build up over time. Cinder cones are small, steep-sided hills that are formed by explosive eruptions. Composite volcanoes are formed by alternating layers of lava and ash, and they are often found in the Pacific Northwest. Coral reefs are formed by the growth of tiny organisms called polyps, which secrete calcium carbona Write your response with exactly 6 paragraphs, separated with the markdown divider: ***.
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