During mating season, male sheep produce hormones that make them aggressive. this is an effect.

Activational effect

Explanation:

Sex hormones are the hormones involved in regulation of sexual activity and development of secondary sexual characters in males and females at the time of puberty. Activational effect is one of the specific effect of sex hormones. The sex hormones target to stimulate the mating behavior in organisms. Hence, the male sheep produce male sex hormone during mating season to increase its sexual activity.

primary succession begins with a bare rock and ends with a forest secondary succession begins after a natural disaster where there is a temporary setback after a forest fire or local destruction, but the surrounding area can fill in

answerall of the above;