Match each environmental change with its description.
chemicals react with water and oxygen that enter water systems.
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nutrients in excessive amounts enter water systems, causing algal bloom.
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a high concentration of toxic chemicals is present in the bodies of animals at the highest trophic levels.
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lunar landing mission. apollo 11 was the first manned mission to land on the moon. the first steps by humans on another planetary body were taken by neil armstrong and buzz aldrin on july 20, 1969. the astronauts also returned to earth the first samples from another planetary body.

explanation:

1)

i))the process of preparing food by green plants in the presence of sunlight is called photosynthesis.

ii) leaf is the site for photosynthesis.

iii) it takes place as,

6h2o+6co2=c6h12o6+602