1) The first picture is a company. They may have a fun, explosive character, they can be very active in life.
2) The second picture is a boy with a computer. He may be clever, curious, he also can be lazy, that's why he always sits in front of the computer.
3) The third picture are two people on the bikes. They may be adventurous and always ready to ride somewhere.
4) Последняя картинка немного непонятна. Я полагаю. что там человек кормит животных? Если да, то caring and kind.