Step 1 — Analyze the word:
The given word is crisis, which is a noun meaning a time of intense difficulty, trouble, or danger.
Step 2 — Rule of plural formation:
Words that end in -is and come from Greek origin usually form their plural by changing -is to -es.
Examples:
- Thesis → Theses
- Analysis → Analyses
- Crisis → Crises
Step 3 — Apply the rule:
Thus, the plural of crisis is crises (pronounced as “cry-seez”).
Step 4 — Example usage:
- The country faced an economic crisis last year.
- Several crises have shaken the global economy in recent decades.
Answer: The correct plural form is Crises.