Which word means 'promoting or leading to'?

The word that means 'promoting or leading to' is "conducive." This term is often used to describe conditions, environments, or factors that contribute favorably to a particular outcome or situation. For example, a conducive environment for learning would be one that supports and helps facilitate the process of education. The root of the word "conducive" is related to the idea of contributing or leading towards a specific purpose or result, which aligns perfectly with the meaning of 'promoting or leading to.'

In contrast, the other options do not convey this meaning. "Consensual" refers to something agreed upon by all parties involved, typically in the context of mutual consent. "Covert" implies something hidden or secretive, lacking any indication of promotion or contribution. "Convoluted" describes something that is complex and difficult to follow, which also does not imply a tendency towards promotion or facilitation. Thus, "conducive" stands out as the appropriate choice for the meaning in question.