Final answer:
The 'make do and mend philosophy' is best represented by encouraging sustainable practices in fashion. This philosophy promotes the idea of repairing and reusing garments instead of constantly buying new ones.
Step-by-step explanation:
The 'make do and mend philosophy' is best represented by option a) Encouraging sustainable practices in fashion. This philosophy promotes the idea of repairing and reusing garments instead of constantly buying new ones. By practicing sustainable fashion, individuals can reduce the environmental impact of the textile industry and promote a more responsible approach to consumerism.