Which of the following human activities could have an irreversible effect on an ecosystem?
i. introducing a new species
ii. urban sprawl
iii. introducing a new chemical
iv. over-hunting

a . i, ii, iii, and iv
b. ii, iii, and iv only
c. i and iii only
d. ii and iv only

I, II, III, and IV

Explanation:

Many human activities can have potentially irreversible effects on ecosystems. Over-hunting, urban sprawl, and the introduction of new chemicals or species can all impact ecosystems in ways that could be permanent.

New chemicals might be introduced to an ecosystem by pollution. Urban sprawl can destroy the natural habitat of plants or animals. Deforestation destroys habitats in a similar manner, even when it is done to generate farmland. Humans have also introduced many new organisms into ecosystems—both intentionally and unintentionally. The effects of these actions hold the potential to be both significant and long-lasting.

when cloud cover increases then the suns ray's which provides the earth with light and warmth gets covered due to the due to the suns ray's being blocked, the temperature in that region

therefore to conclude i would like to say that,

=more the cloud cover, the lesser the

happy to

pls mark as brainliest.

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.