Ponds and rivers are two types of
• marine ecosystems
• rain forest biomes
• freshwater ecosystems
• estuary ecosystems

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

answer: i dont know the answer but this might

explanation:

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