Cell that perform similar function combine to from

A group of cells that perform a similar function is known as a tissue. Multicellular organisms such as, animals all contain differentiated cells that have adapted to perform specific functions. These differentiated cells group together to form tissues. A group of tissues that perform similar functions are known as organs

A) K and Br

Ionic compounds are compounds in which mostly a metal and non-metal bond. Potassium (K) is a metal and Bromine (Br) is a non-metal.