Question

Which of these is a sign that plants in a terrarium are transpiring?

Answer 1

D: Condensation on the sides of the terrarium. By definition, transpiring is the act of plant leaves giving off water vapor, so it'd make sense if you'd find condensation being trapped in the terrarium as a result. :) 

Answer 2

The correct answer is (d) Condensation on the sides of the terrarium

Terrarium is a glass container kept as a decorative piece in home. It contains small plants and soil. This system can be opened to access the plants. The closed terrarium is a system in which the plants grow and the evaporation from both plants and soil condenses on the walls of the container and this condensation proves that plants inside a terrarium is transpiring.