URGANT HELP!!!
Need help with crossword only have three left
#7 clue: This occurs over polar regions at certain times of the year. (2 words)
#11 clue: This type of forest is a nonrenewable resource. (3 words)
#21 clue: This refers to the number of different species in the biosphere. (2 words)
*Will give Brainliest*
