Marcus continues to water his lawn during a serious drought. He figures that watering his little lawn will make no difference. By pursuing his own self-interest Marcus' behavior illustrates

Answer:a social trap

Explanation:

According to social sciences, a social trap occurs when an individual or a small group of people take or follow a personal solution or short term goal that looks innocent but is likely to yield long term consequences that will affect a large number of people.

Marcus thinks that watering his lawn won't take much water hence no one will suffer but I'm reality every drop of water counts hence in a long run this may impact Marcus's neighborhood.