Which of the following could be considered an input?

Rock concerts musical instruments cell phones and contact lenses are just a few things that are possible because of

Imagine you are driving down the highway and reading a sign that states save the planet don't litter which technique of policy enactment is being used

The controlled use of fire by hominids: (a) limited the expansion of hominids into certain environments, such as dry grasslands. (b) decreased the amount of food energy available in the hominid diet. (c) contributed to geographical expansion and food production techniques in positive ways. (d) has been shown to contribute little to the digestive process of hominids.