Parasitism is best defined as -

Commensalism is best defined as -

Primary succession begins with bare rock and -

Secondary succession begins with -

Tree frogs often use trees as protection from storms or rain. This is an example of -

Lice will live and feed off a human scalp causing sores and irritation. This is an example of -

Some coral will provide algae with a protected environment and compounds they need for photosynthesis. In return, the algae produce oxygen and help the coral to remove wastes. This is an example of -

Based on this food web, which organism has the LEAST amount of energy available?

Based on this food web, which organism has the MOST amount of energy available?