Why does random feature subsampling at each split reduce correlation between trees in a random forest?

In gradient boosted trees, the learning rate parameter controls:

Cross-validation is used primarily to:

Adding more trees to a random forest beyond a sufficient number will:

Which term matches this definition?Arises when only one of the parties to a contract is wrong about a material fact. It is not usu- ally a basis for rescinding a contract.

Which term matches this definition?Mutual conditions under which each party’s contractual performance is triggered by the other party’s tendering (offering) performance.

Which term matches this definition?A Uniform Commercial Code (UCC) defense to contractual nonperformance based on happenings that greatly increase the difficulty of performance and that violate the parties’ reasonable commercial expectations.

Which term matches this definition?The substitution of a new contract in place of an old one.

Which term matches this definition?An original contracting party who assigns or transfers contractual rights to a third party.

Which term matches this definition?A defense to contractual nonperformance based on special circumstances that render the performance illegal, physically impossible, or so difficult as to violate every reasonable expectation the parties have regarding performance.