28. Why should coral reefs be protected and conserved?
A. They provide shelter and habitat to marine organisms.
B. They do not have enough protection against intruders.
C. They are sources of income for those involved in illegal fishing activities.
D. They protect huge marine creatures from the strong underwater currents
of the ocean.


29. How does kaingin or clearing out of forest areas by burning to convert into
agricultural lands disrupt the cycles in the ecosystem?
A. Cleared-out forests turn into new breeding grounds.
B. Agricultural lands become natural habitats for wildlife.
C. Plant and animal population in kaingin areas will increase.
D. Organisms in the converted forest areas will lose their natural habitats.​