It’s true (a) because bones become brittle and easier to break if theyre not used. bones more frequently used become stronger.
A system or community would be my guess
Developed Calculus -
<u><em>Gottfried Wilhelm Leibniz
</em></u>
Around the 1670s, two great men — Sir Isaac Newton of England and Gottfried Wilhelm Leibniz of Germany — discovered and developed calculus independently from each other.
Who was the first to study the heavens through a telescope -
<u><em>Galileo Galilei
</em></u>
Galileo Galilei (1564-1642) was part of a small group of astronomers who turned telescopes towards the heavens.
Who developed a model of the universe with the Sun at the center
<u><em>Nicolai Copernicus
</em></u>
The Earth-centered Universe of Aristotle and Ptolemy held sway on Western thinking for almost 2000 years. Then, in the 16th century a "new" (but remember Aristarchus) idea was proposed by the Polish astronomer Nicolai Copernicus (1473-1543).
When enzymes are destroyed and when when the temperatures are to high it causes it to happen
The parietal lobe is located in the middle of the brain and is used for processing tactile sensory information.