Study the given ecosystem diagram and answer the questions on identification, energy source, food chain, and effects of oil pollution.

here are the answers to question 17:

17. The diagram below shows a certain ecosystem. Study it.

a) Identify the above ecosystem

• Pond ecosystem (or Aquatic ecosystem)

b) What is the main source of energy in the above ecosystem?

• Sunlight (or Solar energy)

c) Write down a food chain for the ecosystem ending with young fish as the secondary consumers

• Green plants $\rightarrow$ Young tadpoles $\rightarrow$ Young fish

d) State two ways in which oil discharged from a nearby factory into the above ecosystem would affect organisms in therein

1. Oil forms a layer on the water surface, blocking sunlight from reaching submerged plants, thus inhibiting photosynthesis and reducing oxygen production.
2. Oil can coat the gills of fish and tadpoles, impairing their ability to respire and leading to suffocation.
3. Toxic components in the oil can be ingested by organisms, leading to poisoning, internal damage, or death.