Final answer:
Sentence option B is the most comprehensive and concise, effectively summarizing the research on climate change's effects on marine ecosystems, including critical factors such as temperature changes, biodiversity loss, and ocean acidification.
Step-by-step explanation:
Most Comprehensive and Concise Sentence Option
Option B is the most comprehensive, yet concise sentence: "The study explores the effects of climate change on marine ecosystems, covering temperature changes, loss of biodiversity, and ocean acidification." This sentence succinctly encapsulates the key aspects of the research on climate change effects on marine ecosystems without being overly verbose or omitting important elements. This sentence accurately reflects the research focus on exploring the dynamic effects of climate change such as rising temperatures, biodiversity impacts, and increased ocean acidification, which are critical issues identified by scientists in understanding the alterations within marine environments.