Please capitalize where necessary: number one is physical activity.
A: Number one is physical activity.

Please capitalize where necessary: the upper part of the dip so that they extend beyond the bottom side.
A: The upper part of the dip so that they extend beyond the bottom side.

Please capitalize where necessary: did someone email you a ngr file and you're not sure how to open it? maybe you have found a ngr file on your computer and wondering what it's for? windows might tell you that you can't open it, or in the worst case, you might encounter a ngr file related error message.
A: Did someone email you a NGR file and you're not sure how to open it? Maybe you have found a NGR file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a NGR file related error message.

Please capitalize where necessary: now, french researchers have demonstrated a mechanism that might explain this phenomenon.
A:
Now, French researchers have demonstrated a mechanism that might explain this phenomenon.