Which of the following statements is true?
a. sedimentary rocks form from weathered rock and other particles.
b. during the rock cycle, igneous rock is weathered into metamorphic rock.
c. minerals with cubed crystals belong to the orthorhombic crystal system.
d. natural gas is formed from inorganic material.

B. During the rock cycle, igneous rock is weathered into metamorphic rock.

Explanation:

The igneous rock is formed by solidification of the magma after the volcanic eruption. The magma is hot and cools very slowly. It forms over the surface of the earth crust. The weathering of the igneous rocks may lead to the formation of the metamorphic rock. This occurs over the undersurface of the earth crust under high heat and pressure.

i don't know what the picture looks like but i can take a guess and say maybe basidiomycetes?

hydrogen is a compound or a single element and a element is a pure substence that cannot be separated into simpler subtances

clorine is a compound its a chemical substance that forms when two or more different elements combine

so both hydrogen and clorine are compounds