Questions

Bicycle is a compound machine in the above given options. A compound machine is a machine that is formed by two or more simple machines.

A fossil is a traces or remainings of plants and animals that lived in the past. The fossil record provides evidence of a common ancestor to many species is the option that best describes the fossil record.

Attribution theory was designed to account for how people explain others' behavior. It is a theory in psychology states that the attributions people make about events and behavior can be classed as either internal or external. In an internal, or dispositional, attribution, people infer that an event or a person's behavior is due to personal factors such as traits, abilities, or feelings.

The country Brazil is the largest producer of sugarcane in the world.

No work done as there is no external external pressure in free expansion. 

Hence, Work done in a free expansion process is Zero.

The macronutrient water is the most essential nutrient which plays a vital role in every function of the body. Macronutrients are those nutrients that are required in excess amounts for the development and functioning of the body.