Select the option that will improve the highlighted part of the given sentence. In case no improvement is needed, select 'No improvement required'.
The eggs are warm into a suitable temperature for the larvae to hatch from eggs.

Correct option is C

The correct substitution of the highlighted words is (c) are warmed to.
Explanation: The verb “warmed” should be followed by “to” when referring to achieving a particular temperature.
The structure “warmed to a suitable temperature” is correct and idiomatic.
“Warm into” is incorrect as “into” is not used with temperature adjustments.
Grammatical rule used:
When expressing the act of heating something to reach a certain degree or condition, we use “warm/warmed to + temperature/level.”
Example:
✅ The milk is warmed to 40 degrees before adding yeast.
Other options explained:
· (a) No improvement required: Incorrect because “are warm into” is grammatically wrong.
· (b) are warmed for: “For” is used to indicate purpose, not temperature levels.
· (d) is warmed at: Incorrect subject-verb agreement (“eggs” is plural, so verb should be “are”) and “at” is inappropriate for indicating target temperature.