Pick out the most effective word from the given options to fill in the blanks of the following question.

Q:

He made his camp in the thicket when he was sure that there were sure signs of gorilla _______________ in the surrounding valley. Humans have always built their ______________________ close to rivers as it provides easy access to water.

• 1
  habitation
• 2
  houses
• 3
  tenure
• 4
  lodging
• 5
  seat