Step 1: The correct word describes forceful or hostile behaviour, Aggressive.
Step 2: Its spelling has double g and double s: A-g-g-r-e-s-s-i-v-e.
Step 3: Option 1, Agressive, has only a single g, missing the double letter.
Step 4: Option 2, Agrressive, wrongly doubles the r instead of the g.
Step 5: Option 4, Aggresive, has double g but only single s, missing the second double letter.
Step 6: Option 3, Aggressive, is the only spelling with both required double letters, gg and ss.
Answer: option 3, Aggressive.