the tip of the iceberg

The same question, asked 2 times: 26 Jul 2023 S4*, 26 Sep 2024 S1. Every wording below, oldest first.

Try each one first, then open its answer.

Question 1
26 Jul 2023 S4
79 $Select the most appropriate option to fill in the blank. The termites were just the tip of the _________, but the house was near collapsing in reality.$
Tap an option to check your answer.
Question 2
26 Sep 2024 S1
81 $Select the most appropriate meaning of the underlined idiom. The company understood that these small protests of employees regarding low wages were just the tip of the iceberg .$
Tap an option to check your answer.

Question 1