Pick out the most effective word from the given options to fill in the blanks of the following question.

Q:

a) Her speeches always had the capacity to ____________ the flames of patriotism in the minds of the youth.

b) Plastic can ___________ easily when exposed to fire.

• 1
  arouse
• 2
  ignite
• 3
  instigate
• 4
  excite
• 5
  burn