Question

since the mid - 1600s, the magnificent white marble walls of indias taj mahal have welcomed tourists hoping to visit the mausoleum. recently, however, the white marble has started turning green, thanks to insects that leave patches of their waste on the structure. the insects, known as goeldichironomus, are usually eaten by fish in the nearby yamuna river. however, because drought and water pollution have decimated the fish that once lived in the yamuna, the insect population has exploded.
match causes with their effects.
insects are multiplying.
the taj mahal is turning green.
cause
effect
insects are leaving waste on the taj mahal.
many of the yamuna rivers fish have died.

Explanation:

• For the first cause - effect pair: The text states that "the white marble has started turning green, thanks to insects that leave patches of their waste on the structure". So when insects leave waste on the Taj Mahal (cause), the Taj Mahal turns green (effect).
• For the second cause - effect pair: It is mentioned that "because drought and water pollution have decimated the fish that once lived in the Yamuna, the insect population has exploded". So when many of the Yamuna River's fish have died (cause, as decimation means a large - scale killing), insects are multiplying (effect, as population explosion means multiplying).

Answer:

• Cause: Insects are leaving waste on the Taj Mahal. Effect: The Taj Mahal is turning green.
• Cause: Many of the Yamuna River’s fish have died. Effect: Insects are multiplying.