Fill in the blank with the correct phrase from the options given below:-

Desert flowers can be invisible for years _____ appear suddenly after heavy rain.

actually, but

The correct answer is Option (1) → actually, but

• "Invisible for years" and "appear suddenly after heavy rain" are two contrasting ideas. The first part describes a long period of absence, and the second describes a sudden, dramatic presence.

• The conjunction "but" is necessary to signal this contrast.