Please capitalize where necessary: for any further visa-related questions you should contact the embassy of the destination country directly.
A: For any further visa-related questions you should contact the embassy of the destination country directly.

Q: have a very good wonderful day.

A: Have a very good wonderful day.

Q: ergonomic seat with comfortable backrest
A: Ergonomic seat with comfortable backrest

Problem: measure, through the caravan edge piping profile, from point a until the point on the vehicle where the awning ends (b).
Can you repeat this sentence, but capitalize it?
Answer: Measure, through the caravan edge piping profile, from point A until the point on the vehicle where the awning ends (B).

Text: almudena cathedral in madrid, almudena cathedral in madrid photos, almudena cathedral in madrid pictures

Correct capitalization: Almudena Cathedral in Madrid, Almudena Cathedral in Madrid photos, Almudena Cathedral in Madrid pictures

Problem: a person who may gain or lose as a result of a protest committee's decision, or who has a close personal interest in the decision.
Can you repeat this sentence, but capitalize it?
Answer:
A person who may gain or lose as a result of a protest committee's decision, or who has a close personal interest in the decision.