Based on the options you provided, the statement that presents a threat to traditional ways of life moving forward is:
economies are not ecologically sustainable.
This option suggests that traditional ways of life may be at risk due to unsustainable economic practices that can lead to environmental degradation, loss of resources, and disruption of traditional lifestyles. The other options listed, such as an increasing number of native language speakers or free access to traditional lands, may actually support and uphold traditional ways of life rather than threaten them.