There are many ways to save electricity. Maximize daylight, instead of turning on the lights, open the windows and curtains and let the sunlight in. This prevents the use of electricity. Another way to save electricity, is to come together and stay in one room. This helps save energy because you don't have to turn on the light in every room in the house, just use the one in that single room. When you are not using a device, unplug it! The device is using up electricity to charge itself, that is wasteful and you are losing electricity. Instead of putting your clothes in a washing machine, hang it out to dry. It is more natural and saves you electricity These are all simple things that you can do, day to day to save electricity!
The correct answer is 'number'. Because verbs don't have cases - nouns do. Also, verbs don't have genders - but nouns do. Then, nouns don't have tenses - but verbs do. The only thing they have in common is 'number'.
Slaves didn't want to be slaves so they cried. Slave masters whooped them so they were bleeding. Toil - because they did exhausting work. Sweat because they were sweating while doing that work.
