Questions about example sentences with, and the definition and usage of "Tonga"

A: Almost all correct, but this would be better:

Since Tonga is a Zero-Covid country, strict safety protocols are required to deliver emergency provisions to the South Pacific Island.
Aid workers cannot come into contact with the locals to avoid transmission.

A: × In Tonga, undersea volcanic eruption caused serious damages such as tsunami and volcanic ashes.
✓ In Tonga, the undersea volcanic eruption caused serious damages, such as tsunami and volcanic ashes.

× In January 20th, Kishi of the Ministry of Defend commanded Self-Defense Force to help the people of Tonga, and he said”the Self-Defense Fore has many experiences in helping in disaster area.
✓ In January 20th, Kishi from the Ministry of Defend commanded Self-Defense Force to help the people of Tonga, and he explained that the Self-Defense Force has had many experiences in helping in disaster area.

× Self-Defense Force will deliver water by two airplanes.
✓ Self-Defense Force will transport the water using two airplanes.

× Six Self-Defense Forces are to go to Australia so as to collect information about disaster and.to cooperate with other countries.
✓ Six Self-Defense Forces are to go to Australia so as to collect information about disaster, and cooperate with other countries.

A: × In Tonga, undersea volcanic eruption caused serious damages such as tsunami and volcanic ashes.
✓ In Tonga, an undersea volcanic eruption caused serious damage with a tsunami and volcanic ashes.

× In January 20th, Kishi of the Ministry of Defend commanded Self-Defense Force to help the people of Tonga, and he said”the Self-Defense Fore has many experiences in helping in disaster area.
✓ On January 20th, Kishi of the Ministry of Defense commanded the Self-Defense Force to help the people of Tonga, and he said ”the Self-Defense Force has a lot of experience in helping in disaster areas".

× The people need drinkable water because volcanic ashes polluted tap water.
✓ The people need drinkable water because volcanic ashes have polluted tap water.

× The machines cleaning ashes and helicopters will be sent by ships.
✓ Machines to clean ash and helicopters will be sent by ships.

× Six Self-Defense Forces are to go to Australia so as to collect information about disaster and.to cooperate with other countries.
✓ Six Self-Defense Forces are to go to Australia to collect information about the disaster and to cooperate with other countries.

A: There are a few errors.

What happened in Tonga was *an* unprecedented disaster *in its* history. Aid efforts have been hampered by ash falling from *the* volcano.

【There is one volcano that caused this, so it's better in context to use "the".】

A: Perfect!

Note that people are more likely to say “a lack of information”, because paucity is quite formal, but it has been used correctly.