Please capitalize where necessary: its importance is not only as a source for learning and reference but also as a collection of attractive open questions.
A: Its importance is not only as a source for learning and reference but also as a collection of attractive open questions.

Q: view cart "tagtomat: vrktjer til grnne fllesskaber i byen (e-book)" has been added to your cart.

A: View cart "TagTomat: Vrktjer til grnne fllesskaber i byen (e-book)" has been added to your cart.

Q: morning temperatures will be around 13 c. during the day they will reach a maximum of 17 c. low temperatures at night will be around 11c. southwesterly winds are moderate.
A: Morning temperatures will be around 13 C. During the day they will reach a maximum of 17 C. Low temperatures at night will be around 11C. Southwesterly winds are moderate.

Problem: if your pc opens the dne file, but it's the wrong application, you'll need to change your windows registry file association settings. in other words, windows is associating dne file extensions with the wrong software program.
Can you repeat this sentence, but capitalize it?
Answer: If your PC opens the DNE file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating DNE file extensions with the wrong software program.

Text: give a classic summer plant a rustic look, and let your customers enjoy a new plant experience on the terrace or at the front door.

Correct capitalization: Give a classic summer plant a rustic look, and let your customers enjoy a new plant experience on the terrace or at the front door.

Text: the most plausible cause of the pharaohs curse is a small fungus called aspergillus niger.

Correct capitalization:
The most plausible cause of the Pharaohs curse is a small fungus called Aspergillus niger.