Solution:
The layer of the ocean that receives light is called the photic zone. It is categorized into the euphotic and disphotic zone. Euphotic zone is the uppermost layer of the ocean where sufficient light for photosynthesis is found.

Solution:
Radiation poisoning happens when a radioactive substance gives off particles that get into a person's body and cause harm. Different radioactive substances have different characteristics. They can harm and help people in different ways, and some are more dangerous than others.

Solution:
Temperature determine the kind (wavelength) and amount of radiation that an object emits.

Solution:
All the statements are correct regarding ecological succession except that it is a random process.

Solution:
The air parcel expands as it rises and this expansion, or work, causes the temperature of the air parcel to decrease. As the parcel rises, its humidity increases until it reaches 100%. When this occurs, cloud droplets begin forming as the excess water vapour condenses on the largest aerosol particles.

Solution:
All of the above are correct.

Solution:
Percolation causes loss of water because of seepage of water into the soil.