What's your opinion on bone marrow babies? free points btw

What three natural resources are found in the great lakes region

Design techniques and materials that reduce the negative environmental impact of a structure are referred to as

Ants live on acacia trees in south america. the ants feed on sugars secreted by the trees. the trees provide room for the ants to live. the ants sting any other insect or animal that comes to eat the trees. what type of relationship is this?