A nurse is explaining electroconvulsive therapy (ECT) to members of a depression support group. Which statement would indicate understanding?
1) ECT is a type of therapy that uses electric shocks to treat depression.
2) ECT is a type of therapy that uses medication to treat depression.
3) ECT is a type of therapy that uses talk therapy to treat depression.
4) ECT is a type of therapy that uses physical exercise to treat depression.