You are presented with the question "what do coral polyps form?" and the following answer choices:  - lagoon  - graptolites  - a cuticle  - barnacles  - bioaerosols  - cave  - coral reef  - salt and water.  Now knowing that many corals secrete an exoskeleton that builds up to become a coral reef and coral reefs are made up of the accumulated exoskeletons of the coral polyp, choose the best answer.
coral reef

You are presented with the question "scraping oneself on a contaminated object may cause what?" and the following answer choices:  - an area wet with medicine  - a pill for health  - cause their death  - an area clean from bacteria  - fissures of hot, acidic water  - an area swollen with pus  - contamination  - harmful substances  Now knowing that scraping oneself on a contaminated object may cause infection and an abscess is an infected area swollen with pus, choose the best answer.
an area swollen with pus

You are presented with the question "What swims to female reproductive organs for fertilization?" and the following answer choices:  - barnacles  - alpacas  - fur seals  - male gametes  - A Greek letter  - eggs  - birds  - tadpoles  Now knowing that sperm had to swim from male to female reproductive organs for fertilization and sperm and eggs are cells known as gametes, choose the best answer.

male gametes