Why is conventional solar electricity is so expensive to generate??

There are two main reasons that solar panels cost so much: The first is the cost of the equipment. Producing it requires advanced manufacturing as well as expensive raw materials, such as high-grade silicon for the solar panels and lithium for solar batteries.

Explanation:

Most solar cells are made from silicon—the same semiconductor material that is at the heart of computers. The cells are expensive to produce because it takes a great deal of energy to purify the silicon.

a) the particles of the chair are strongly held together.