That is what the actual confirmation email looks like from Yahoo when you sign up for a Yahoo email account. They send that email to the address you give as your alternative email address to confirm that you entered the correct address. The alternative email address is where they send mail if you request a new password and stuff like that.
I just signed up for a bogus Yahoo account and I got the same email from Yahoo asking me to verify the address I gave as an alternative contact email address.
It could still be a phishing scam that tries to get you to click a link. It is possible that the link could take you to a web page that asks for personal information or tries to exploit a security vulnerability and hack in to your computer. It is also possible that it is completely legitimate and someone mistyped their alternative contact email address when they signed up for Yahoo. It’s hard to be sure, and good to be paranoid.
One way to check is to look at the raw source for the email message. You can look at the link where they ask you to click to remove and check if it does anything phishy. But that requires that you know HTML and are familiar with the various ways of disguising a phishing URL. That’s not something that normal people can do.
If you just ignore the email and don’t respond it’s not going to be an issue for you. It would only be an issue for the person who was trying to sign up for a Yahoo account and the only issue there is that their alternative contact address won’t be confirmed and then Yahoo would stop using it.
Email addresses that are just the first name followed by a last name are vulnerable to dictionary attacks where spammers try to guess an email address by going through lists of common names and putting a random first name together with a random last name and hope that it turns out to be a real email address. Email addresses made up of a first name and last name are also very common and it is possible that someone else was using that same email address earlier before they canceled their Verizon service. Then you end up getting spam and other stuff that was meant for them.