a large collection of brochures, annuals, trade papers etc. provides detailed information about the topic danish music life (institutions, towns, ensembles etc.)

How would the previous sentence be correctly capitalized?
Answer: A large collection of brochures, annuals, trade papers etc. provides detailed information about the topic Danish Music Life (institutions, towns, ensembles etc.)
people eventually changed their mind, cats became popular again and people accepted cats back into their homes.

How would the previous sentence be correctly capitalized?
Answer: People eventually changed their mind, cats became popular again and people accepted cats back into their homes.
depending on the humid micro-climate on site, aim rather for the lower number or fewer (down to eight to ten canes per running metre).

How would the previous sentence be correctly capitalized?
Answer: Depending on the humid micro-climate on site, aim rather for the lower number or fewer (down to eight to ten canes per running metre).
the luminaire is produced in extruded aluminium with die cast aluminium end caps.

How would the previous sentence be correctly capitalized?
Answer: The luminaire is produced in extruded aluminium with die cast aluminium end caps.