Answer:
Option (A).
Explanation:
Saddle joint is a type of synovial joint and also known as sellar joint. These joints are present in thumb, shoulder and inner ear.
The bone has one part concave inward and other part is convex outward. This bone can articulate with thumb's metacarpal and trapezium of the carpal bone. Saddle joints show abduction and adduction movements.
Thus, the correct answer is option (A).
Choice 1 protons and neutrons, not electrons because they are in the outside circling it
1). A good example for mutualism is People and plants. We provide plants Carbon dioxide. Plants provide us Oxygen
2).Biome is where you have your tundras, Rain forests, Deserts, etc. then you have to give 3 characteristics like temperature, precipitation levels, soil type, etc.
I will have to get to question 3 later since im in class but ill give you the answer to that one. its easy
