How close is that one to what appears to be a deck?

These white pines get really wide, really fast.

The needle color/drop is normal. I'm sure others will chime in with more specifics.

how many needles in a bundle.. cant tell from the pic.

looks like a white pine.. 100 foot potential .. easy to break in snow, ice or wind storms ... about 40 feet too close to the house ...

no conifer holds its needles forever.. most lose older leaves in 2 to 3 years.. if you note the pattern.. its all last years needles ... TOTALLY NORMAL... increased by drought and/or heat ...

IMHO.. get rid of it.. but not because of the yellowing.. see link based on ID guess ...

ken

PS: i had 6 of those around a deck.. that size when i bought the house.. i could have taken care of business for free ... 10 years later i had to pay $1000 to have six 40 footers removed professionally after a severe ice storm took off the top 10 feet ....

Here is a link that might be useful: link