The answer is B . Neutrons are found in nucleus
Cells are the basic building blocks of life, which can join together to form tissues, while different groups of tissues join together to form organs. These organs are then connected together to form organ systems, such as the digestive system, which includes the stomach, esophagus, intestines and other organs.
B. Density has been decreased Or D.
The answer is D its tightly packed cells allow for proctection against harmful substances.
