Spot the one that does not belong

Exercise and reference answers

Questions

1. Items

   1. Air
   2. Producers
   3. Water

   Odd item

   Producers

2. Items

   1. Productivity
   2. Decomposition
   3. Stratification

   Odd item

   Stratification

3. Items

   1. Soil
   2. Producers
   3. Consumers

   Odd item

   Soil

Explanation