You need to answer a given question containing a blank (_). Your answer must be one of the two objects mentioned in the question, for example "trophy" and "suitcase". Your answer must not contain a word that is not present in the question. Please don't use articles (e.g., the, a) before the answer.

The tree had to be planted directly in the lustrous forest because the _ was welcoming.
forest

The computer was stumped by the algorithm but solved the equation with ease, as the _ was so complex.
algorithm

Our preference was for a simple service rather than an extravaganza, as the _ would be costly for us.

extravaganza