Please answer

Ok there is no figure 2.1 shown but I am going to guess that it is the epidermis as that is a plant tissue that is transparent

The reason it is transparent is because it is there to protect the inside of the plant that houses photosynthesizing plastids (chlorophyll) and by being transparent more light can get in and aid in the photosynthesis

Explanation:

the most common energy conversion is from kinetic energy to potential energy, and then from potential energy to kinetic energy.

later on comes the heat energy, mechanical energy, and other energy conversions.

this energy conversion is so common that we can find it in our day to day lives as well.

- one of the most common energy conversions involves the changing of potential energy to kinetic energy or kinetic energy to potential energy