explain economic choice?

In economics, economic choice is a choice made by an individual as resources are scarce. In general, it is about the efficient allocation of resources. There are alternatives to choices.
A technical answer will be the tangent point between the budget constraint line and the indifference curve.
The budget constraint line, a downward sloping line at one end is of good x and the other end is of good y
The marginal rate of substitution, as you buy more of good x, the more valuable of good y (vice versa)
The indifference curve, shows the value the combination of the goods. (In other words the indifference curve is the locus of various points showing different combinations of two goods providing equal utility to the consumer.)
An individual should consume at a point where the indifference curve and the budget constraint meet.