There is an increased number of near a fracture site, which leads to growth of new connective tissue called a
osteoblasts; hematoma
osteoclasts; hematoma
osteoblasts; callus
osteoclasts; callus

The correct answer is option osteoblasts; callus.

After the fracture, the body starts the healing the bone. In the process of healing of the bone, the osteoblasts are increased at the site of the fracture and starts the formation of the new bone cells. this result in formation of a structure called callus. the callus is formed around the broken bone; this helps in joining the end of the bones.

well first you need the sample of the temperature and gas level. i couldnt write a hypothesis unless i had some data. i think temperature changes will effect volumes of gas because gas changed into a solid or liquid at specific temperatures.