Is this a real question??????????????????
Personal pronouns, "I, I'm, I'll I'd" etc. must be capitalised. As for the middle of a sentence, I'm contains "I" and so therefore it is capitalised.
Answer:
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There are five major types of biomes: aquatic, grassland, forest, desert, and tundra, though some of these biomes can be further divided into more specific categories, such as freshwater, marine, savanna, tropical rainforest, temperate rainforest, and taiga. Aquatic biomes include both freshwater and marine biomes.
Explanation: