In the last 100 years world sea level has risen by about 20 cm, or 0.2 m. Compared with this value, how much variation in sea level occurred generally from the year 1000 to the year 1900

The sample with the lowest specific heat capacity will have the greatest temperature increase. in this case, it would be platinum.

Wooden , walls ,doors ,support

Ohm's law tells you that i = v/r where v is equivalent voltage and r is equivalent resistance of the circuit
since all circuits have the same voltage, your question is really asking which circuit has the lowest total resistance, since the lower the resistance, the higher the current
circuit a has a resistance of 5 ohms; circuit c is in series so has a resistance of 10 ohms; circuit b is in parallel and therefore has a resistance of 2.5 ohms (review your notes on adding resistances in parallel and series); therefore b has the highest current