Under a leader, a team of followers has failed to achieve success in conducting research. What does an effective leader do in this situation?

leader accepts failure and gains experience from it

Explanation:

solution

team leader is someone who provide you guidance and instruction and direction group or team of employees as they can complete project

and they are responsible for all developing and implementing timeline

so their team use to reach at end goal

but if team failed to achieve success so leader should accepts failure

but with the fail they gain something that is experience

so we can say here leader accepts failure and gains experience from it for doing better