Tense allows for the sequencing of two or more noncontinuous events that occur in the same time period is perfect tense.
The perfect tense is a verb which indicates the actions which occurred earlier in the time and the resultant action is focused.
For example, the children have completed the homework.
The above sentence gives the information about the past action of 'doing homework' which is now completed, referring to the result of the action occurred earlier.
When you are a child, if you grow up in an abusive household, you learn to be more aggressive. However, if you have a loving household, you're more likely to be considerate of others. There are many other examples, such as someone smiling to you could save your life, while someone being rude could end it. It only takes one gesture to change someone's world.
I don't see any underlined words in the sentence. However, I'll just post my answer based on my understanding.
Where there is water ⇒ subordinate clause
There are mosquitoes ⇒ independent clause
Independent clause is a complete sentence. It has a subject, a verb, and expresses a complete thought.
Subordinate clause is a dependent clause that starts with a conjunction. It also has a subject and a verb but it is dependent on the main clause.