According to title 18 united states code (usc) § 2332a, "…any weapon that is designed or intended to cause death or serious bodily injury through the release, dissemination, or impact of toxic or poisonous chemical or their precursors" is called

weapon of mass destruction

Explanation:

Any weapon that cause huge loss of life of human , artificial structure like building or natural structure are termed as weapon of mass destruction

The four main type of weapon which cause numerous death an destruction are characterized as

Biological

chemical and

Nuclear

out of above weapon , biological weapon are the most dangerous weapon which can cause serious threat to human

i think the answer is true : ))