A group of chronic autoimmune diseases that cause inflammatory and fibrotic changes to skin, muscles, joints, tendons, cartilage, and other connective tissues is .

Scleroderma

Explanation:

Scleroderma which is also called systemic sclerosis is a rare group of disorders that affects more women than men, in which the skin and connective tissues become hardened and tightened over time.

Scleroderma is said to be caused by the abnormal production and accumulation of collagen in the tissues of the body, of which he immune system plays a major role. This can be triggered by factors such as immune system problem, genetic and environmental factors. Symptoms might include, muscle weakness,painful and swollen joints, sores on fingertips, cold fingers, hardened or thickened skin etc .

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answer: collecting information/data

reason: the student is going around and asking people questions to collect data

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events in order:

1.       vishnu schist

2. zoroaster granite

3. bass limestone

4. hakatar   shale

5. igneous intrusion

6. shinumo quartzite

7. dox sandstone

8. tapeats limestone

9. bright angel shale

10. muav limestone

11. temple butte limestone

12. redwall limestone  

nonconformity

answer: the unkar group shows angular unconformity because the layers are turned at angle.

unconformity

answer: specifically the angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled. an angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled.

disconformity

answer: the disconformities aremarked irregular lines between the sedimentaryrocks layers.