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The first picture is Translucent.

The second picture is Opaque.

The third picture is Transparent.

The fourth picture is Transparent.

Explanation:

Translucent objects some light to travel through them (since there was liquid in the glass, some of the light was not able to pass through).

Opaque objects are not able to see through (since the ground is solid, you're no able to see through it, nor any of the light passes through it).

Transparent objects allow light to pass through (jellyfish and the magnifier glass both allowed the light to pass through, which means you can see through the object).

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete