The sun unevenly heats the minerals in a rock, causing the rock to break. this is an example of a) chemical weathering b) biological weathering c) physical weathering d) erosion

The answer would be C  physical weathering because heat and the breaking of the rock can be the result of physical weathering, and the other answers would not make sense.
Biological weathering would be the breaking down of the object due to a form of life (incorrect answer),
erosion is the carrying away of something (incorrect answer),
and chemical weathering would be changing the identity of the substance(incorrect answer).

Cell is the most basic unit of matter that can carry out all the processes of life however not all cells are alike.The different structures found within the cell is called the organelles and are assigned to perform specific function in the specific cell.  It is also said that organelles maintain the life of the cell. The organelles of a single cell like the organs of a multicellular organism is very essential for the survival of the body. The presence of organelles in both unicellular and multi-cellular organisms are very essential in orde to maintain life and carry on with its individual functions.