When a child breaks a bone, which of the following is responsible for rebuilding new bone tissue in the fracture while it heals?

a. osteoblasts
b. osteoclasts
c. osteoporosis
d. osteocytes

Option 'A' is correct.

Explanation:

When a child breaks a bone, Osteoblasts is responsible for rebuilding new bone tissue in the fracture while it heals.

Because Osteoblasts build new bone if  bones get broken somehow.

The new bone that built by Osteoblasts is known as "Osteoid", which is composed  of bone collagen and other protein.

They control mineral and calcium decomposition.

Osteoblasts are found on the surface of new bone.

Hence, Option 'A' is correct.

hope it mark me as brainlieast.

there are 35 white marbles

step-by-step explanation:

y- yellow marbles

4y + 5 = 45

subtract 5 from both sides

4y = 40

divide for from both sides

y = 10

plug in 10 to get 40 yellow marbles then subtract by 5 to get 35 marbles

thus there are only 10 yellow marbles