How long does it take for an ecosystem to form and colonize around a hydrothermal
vent?

When studying the calumet region of illinois and indiana alfred meyers noted four stages of development as new groups occupied this land in stage 2 farmers used the land primarily to grow food for their familes and their small communities

The larges lakes in the world are found in: asia europe north america south america

The last photo u wonder what is this telling me to do?