Is is a present tense verb.
Past of is is was and future tense of is is will/shall.
it is appropriate to break the rule that requires subjects joined by and to use a plural verb when either and neither are subjects. They always take singular verb.
For example :
Either of us is capable of doing the job
He and Stella boarded a train bound for Pittsburgh, Pennsylvania.
OR
They boarded a train bound for Pittsburgh, Pennsylvania.
Connect the red and black things to each other then turn on your battery
Your answer is noun clause
<span>A </span>noun clause<span> is a dependent </span>clause<span> that acts as a </span>noun<span>, they start with What, when, where, or which. In this sentence the word Which is used.
Hope I helped ;)
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