Yes, less tread to channel the water.
Agressive tread, bad alignment
good trac on dry bad on wet
More than narrow tread tires.
Minimum tread depth for all 4 tires is 2/32"
Yes. the rubber is being worn away from the tire expeditiously.
The "tread" is the part of the tire that is supposed to touch the ground. A tire with no tread would be a tire that is not supposed to touch the ground. You may be wondering why tires have a pattern of grooves (a.k.a., voids) in the tread. They're for bad weather. The grooves allow rain, and (if they're wider) mud and snow to squelch out from under the tire so that the tread can come into contact with something solid on which to get a grip.
You need new tires of the tread is wore down to the base of tire. put a nickel between the treads. head facing toward the tire. if the tread is not touching the head you really need new ones. if in the rain or snow u have trouble staying on the road. that is bad too.
60% tread wear.
Many tires have tread wear indicator bars molded into the tread. When the tread is worn down to where you can see a solid bar of rubber across the width of the tread, it is time to replace the tire.
I assume you are referring to the tread. High grip will have a more aggressive tread design used in off-road conditions or in deep snow. They are called off-road tires or snow tires. The difference is in the tread design.
While it is good to use tires with the same tread and sizes, it is possible to use tires with different tread patterns, though you should be careful as the performance of the two tires may be different, causing your car to be unbalanced, endangering your passengers.