Cadena trófica

The video explains how energy is transferred through living things in an ecosystem, using a simple marine food chain as an example. It starts with phytoplankton, which are consumed by zooplankton, then small fish, larger fish, and sharks. At the base of all food chains are primary producers like algae and plants, which derive their energy directly from the Sun.

Explain the flow of energy from the Sun to larger fish and sharks in the food chain.

How do algae and plants obtain their energy?