Which environmental change played a key role in making human survival easier and bringing about the Neolithic age decline in global sea level end of the Ice Age extinction of mammoths increase in cave?

The end of the Ice Age was marked by a global warming trend which resulted in the retreat of glaciers, the expansion of grasslands, and the rise of sea levels. These environmental changes made human survival easier by providing more favorable conditions for agriculture and settlement. The decline in sea level exposed more land areas, facilitating human migration and contributing to the decline of megafauna like mammoths.