While Amit was eating guava, he observed that the flesh of the guava was gritty. Which among the following tissues makes the flesh of the pear and guava gritty?

These are special sclerenchymatous cells found in the cortex, pith, phloem, hard seeds, nuts and stony fruit. The flesh of the pear and guava are sometimes gritty due to the presence of sclereids. These cells are very thick walled, hard and strongly lignified. They are isodiametric, polyhedral, slightly elongated or irregular in shape. Their function is to give firmness and hardness to the part concerned.