What indicates that a member is willing to consider a motion made by another member?

The correct answer is derived from the specific role that a second plays in parliamentary procedure. When a member seconds a motion, it signifies that they are willing to consider the motion put forth by another member. This is an essential step in the process because it shows that at least one other member supports the idea enough to have it debated and voted on by the assembly. Without a second, the motion does not advance to discussion, and therefore, the proposal cannot be considered further.

The other options represent different concepts in parliamentary procedure but do not specifically indicate a member's willingness to consider a motion. For instance, consensus refers to a general agreement among members, which is a broader concept, while motion support could imply backing a motion in a more vague way. Approval typically means a decision reached after discussion and voting rather than an initial willingness to consider a proposal. Thus, the act of seconding a motion is the definitive indicator of a member's readiness to engage with the motion at hand.