I need help as soon as possible thanks

It's probably because some types of violets are blue

The enviroment with hedge hogs

Yes, it’s awesome
: )

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.