Match each feature created by erosion to the correct description
| a channel of connected grooves created by
runoff
stream
one of many channels that connect to form a
river
tributary
a small groove in soil created by runoff
gully
CH
a series of connected channels that fills with
water

the solar system used to have much dust particles option no d

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

i think   the answer is c hope i'm right