2. The more diverse an ecosystem is –

more biologically diverse communities appear to be more productive

Explanation:

Biodiversity boosts ecosystem productivity where each species, no matter how small, all have an important role to play. For example, A larger number of plant species means a greater variety of crops. Greater species diversity ensures natural sustainability for all life forms

Hope this helps!

(btw i got this from google)

the answer to your question is sperm

clumped distribution, because you'de have all of the population gathered in a relatively small are.

it's the most common because it provides protection and a mate for reproduction

example: humans, seeweed, cattles, etc.