Define set, element and subset with example.

A set is a well-defined collection of objects. Each object in a set is called an element of the set. Two sets are equal if they have exactly the same elements in them. ... If every element in Set A is also in Set B, then Set A is a subset of Set B.

it would be c. predictability

1) estimating temperature to the nearest tenth of a degree

2) estimating the mass of the sample to the nearest tenth of a gram

4) the position of the cups of sand and water under the heat lamp