What are the disadvantages of
regeneration​

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Explanation:

This disadvantage could be in terms of poverty, labour force, or lack of access to opportunities that other children may have

volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).

the tricuspid valve is present between right atrium and right ventricle