Please select the word from the list that best fits the definition

an explanation of how or why something happens

The 5th term in a series of even number that begin 3x

Which region was the hearth for the largest number of agricultural animals such as pigs sheep and cows

Afathom is a unit of length, usually reserved for measuring the depth of water. a fathom is approximately 6 ft in length. take the distance from earth to the moon to be 230,000 miles, and use the given approximation to find the distance in fathoms.