The human actions that may lead to plagioclimax communities are:
1. Pruning trees
2. Developing area
3. Gardening
Pruning trees, developing areas for construction or urbanization, and gardening by altering the natural vegetation and landscape can disrupt the natural succession process, leading to the formation of plagioclimax communities. These communities are characterized by a different composition and structure compared to the climax community that would have developed naturally without human intervention.