Rainwater Management is a credit that aims to reduce runoff, improve water quality, and restore natural hydrology1. It is part of the Sustainable Sites category, which addresses the environmental impacts of the site selection, design, and construction23.
Reference:
LEED v4 | HPAC Engineering2
LEED v4 for BUILDING DESIGN AND CONSTRUCTION - USGBC3
NC-v4.1 SSc4: Rainwater management | LEEDuser1

These strategies are core components ofLow Impact Development (LID)andgreen infrastructureapproaches for rainwater management:
"LID emphasizes... minimizing land disturbance, preserving vegetation, minimizing impervious cover..." These help reduce runoff volume and replicate the site's natural hydrology, improving rainwater management.

Explanation
Green Cleaning is a plan that is implemented after occupancy to ensure that the building is maintained in a way that reduces the environmental and health impacts of cleaning products, equipment, and practices. Green Cleaning is part of the LEED v4 Operations and Maintenance rating system, and it includes credits for purchasing sustainable cleaning products and materials, using green cleaning equipment, implementing an indoor integrated pest management program, and developing a green cleaning policy1.
References:
LEED v4: Operations and Maintenance Guide1, pages 36-41

The project team should have selected LEED for Existing Buildings: Operations and Maintenance Rating System, as the operational and maintenance phase has begun for a newly constructed school in operation for one year and undergoing minor improvements. The LEED rating systems are designed to address the specific needs and characteristics of different types of buildings and projects. The project team should choose the most appropriate rating system for their project based on the scope, scale, and goals of the project. The LEED for Existing Buildings: Operations and Maintenance Rating System is intended for buildings that are already in use and want to improve their performance and sustainability through best practices in operation, maintenance, renovation, and occupant engagement1 . Reference: LEED v4 Green Associate Candidate Handbook1, LEED v4 O+M Reference Guide