Questions

Water has the maximum density at 4oC. So at this temperature, it sinks down to bottom and stays here. If it cools further, it will become less dense and move up. So while the upper layers can cool enough to form ice, the bottom layers remain as water at  4oC .  

Therefore, (C) is correct.

A piano is a musical instrument which has keys, pedals and strings in which the strings are struck by hammers.

sedimentary features all are related to water deposited minerals and rocks.

Which of your choices has nothing to do with water is not a sedimwntary structure. Here in the given choices Magma emplacement is not a sedimentary structure.

The given statement, The heat from the sun reaches earth through Convection is FALSE.

Heat from the sun actually reaches the earth through Radiation. The process occurs through electromagnetic radiation, specifically, in which molecules are warmed when the heat reaches them, and these molecules then warm other molecules touching them, which continues until we feel the sun's heat.

Tips :

In order to achieve the commitment, leaders have to request and convince the team to set goals and put them into the process. The cooperative spirit and solidarity for goal achievement are created by the leaders. The team is led into the implementing period as quickly as possible. The argument and ideas from all stakeholders need to be praised. In order to have a success and brilliant commitment, they must express their passionate personal commitment and boost a useful cultivation by highly evaluating individuals’ value and their contributions.