1. of the matter in the Universe is found in the Sun.

i didn’t understand your question but archipelagos are groups of island hope this

This question has already been answered by someone else.here is a link.  hope that it .

When a lake, river or other aquatic  system  becomes  eutrophic, it can have serious negative effects on other organisms like fish, birds and even people.if an algal bloom is so bad that it causes wide-spread death  in  the  water, the organisms that die will all sink to the bottom and start to decompose.

Just try your best buddy